Damage over Time
Damage over time (DoT) is a condition that causes the affected unit to constantly take damage until the effect expires, is dispelled, or the target moves out of range. Damage is dealt at the end of each interval, the first of which begins when the spell lands. Some spells come with an initial damage, which may or may not be equal to the periodic damage.
Notes:
Initial Damage: Many DoTs start immediately upon impact. The initial damage in this case is the same as damage per instance. Some DoTs have different initial damages.
Interval: Time between instances in seconds.
Damage per Instance: Damage of each tick after the initial damage.
Damage Duration: Duration from start to the last instance of damage. In many cases this is shorter than effect duration, especially ones that start immediately.
Number of Intervals: Generally equals Damage Duration / Interval. Does not include initial damage.
Max Total Damage: Generally equals Initial Damage + Damage per Instance × Number of Intervals.
Abilities that deal damage over time[edit]
 Initial Damage: 0
Interval: 1
Damage per Instance: 15/20/25/30
Damage Duration: 16
Number of Intervals: 16
Max Total Damage: 240/320/400/480  Initial Damage: 30/50/70/90
Interval: 1
Damage per Instance: 30/50/70/90
Damage Duration: 4
Number of Intervals: 4
Max Total Damage: 120/200/280/360
Stops dealing damage if the target moves 740 range away from the mark at any point during the initial debuff.  Initial Damage: 7.5/15/22.5/30
Interval: 0.5
Damage per Instance: 7.5/15/22.5/30
Damage Duration: 6
Number of Intervals: 12
Max Total Damage: 97.5/195/292.5/390
The effect is muted if another enemy unit is within a 225 radius.  Initial Damage: 0
Interval: 1
Damage per Instance: 20
Damage Duration: 4/5/6/7
Number of Intervals: 4/5/6/7
Max Total Damage: 80/100/120/140  Initial Damage: 0
Interval: 1
Damage per Instance: 25/30/35/40
Damage Duration: 4/5/6/7
Number of Intervals: 4/5/6/7
Max Total Damage: 100/150/210/280  Initial Damage: 20/45/70/95
Interval: 0.7
Damage per Instance: 20/45/70/95
Damage Duration: 10.5
Number of Intervals: 15
Max Total Damage: 320/720/1120/1520
Not in the form of a debuff.  Initial Damage: 50
Interval: 0.5
Damage per Instance: 50
Damage Duration: 1/1.5/2/2.5 for heroes, 9.5 for creeps
Number of Intervals: 2/3/4/5 for heroes, 19 for creeps
Max Total Damage: 150/200/250/300 to heroes, 1000 to creeps  Initial Damage: 0
Interval: 0.1
Damage per Instance: 3/5/7/9
Damage Duration: 25
Number of Intervals: 250
Max Total Damage: 750/1250/1750/2250  Initial Damage: 14/20/26/36
Interval: 1
Damage per Instance: 14/20/26/36
Damage Duration: 7
Number of Intervals: 7
Max Total Damage: 112/160/208/288  Initial Damage: 0
Interval: 0.25
Damage per Instance: 3.5 + 0.25%/0.625%/1%/1.375% of max HP
Damage Duration: 6
Number of Intervals: 24
Max Total Damage: 84 + 6%/15%/24%/33% of max HP  Initial Damage: 0
Interval: 0.25
Damage of each Instance (Level 1): 2/5/7/10/12/15/17/20/22/25/27/30/32/35/37/40/42/45/47/50 ( /52/55/57/60/62/65/67/70)
Damage of each Instance (Level 2): 3/6/9/12/15/18/21/25/28/31/34/37/40/43/46/50/53/56/59/62 ( /65/68/71/75/78/81/84/87)
Damage of each Instance (Level 3): 3/7/11/15/18/22/26/30/33/37/41/45/48/52/56/60/63/67/71/75 ( /78/82/86/90/93/97/101/105)
Damage Duration: 5 ( 7)
Number of Intervals: 20 ( 28)
Max Total Damage: 520/648/780 ( 1009/1257/1512)  Initial Damage: 40/60/80/100
Interval: 2
Damage per Instance: 40/60/80/100
Damage Duration: 6
Number of Intervals: 3
Max Total Damage: 160/240/320/400  Initial Damage: 20/35/50
Interval: 1
Damage per Instance: 20/35/50
Damage Duration: 14 ( at least 15)
Number of Intervals: 14 ( at least 15)
Max Total Damage: 300/525/750 ( at least 320/560/800)
Affected units under 25% health can be denied.  Initial Damage: 0
Interval: 1
Damage per Instance: 10/20/30/40
Damage Duration: 10/12/14/16
Number of Intervals: 10/12/14/16
Max Total Damage: 100/240/420/640  Initial Damage: 0
Interval: 1
Damage per Instance: 20
Damage Duration: 5
Number of Intervals: 5
Max Total Damage: 100
Available for Level 1, Level 2 & Level 3 Elder Dragon Form.  Initial Damage: 0
Interval: 0.5
Damage per Instance: 25/37.5/50
Damage Duration: 6
Number of Intervals: 12
Max Total Damage: 300/450/600
Duration refreshed if any Stone Remnants nearby.  Initial Damage: 0
Interval: 0.2
Damage per Instance: 6/8/10/12
Damage Duration: 8/12/16/20
Number of Intervals: 40/60/80/100
Max Total Damage: 240/480/800/1200
Not in the form of a debuff.  Initial Damage: 0
Interval: 1
Damage per Instance: 80/60/120/100
Damage Duration: 1/2/2/3
Number of Intervals: 1/2/2/3
Max Total Damage: 80/120/240/300  Initial Damage: 0
Interval: 1
Damage per Instance: 50/100/150 ( + Midnight Pulse damage)
Damage Duration: 4
Number of Intervals: 4
Max Total Damage: 200/400/600 ( + 12%/15%/18%/21% of max HP)  Initial Damage: 30/50/70/90
Interval: 2
Damage per Instance: 30/50/70/90
Damage Duration: 4
Number of Intervals: 2
Max Total Damage: 90/150/210/270  Initial Damage: 0
Interval: 1
Damage per Instance: 3%/3.75%/4.5%/5.25% of max HP
Damage Duration: 11
Number of Intervals: 11
Max Total Damage: 33%/41.25%/49.5%/57.75% of max HP  Initial Damage: 0
Interval: 1
Damage per Instance: 15/30/45
Damage Duration: 15/17/19
Number of Intervals: 15/17/19
Max Total Damage: 225/510/855  Initial Damage: 0
Interval: 0.1
Damage per Instance: 7/12/17/22
Damage Duration: 3
Number of Intervals: 30
Max Total Damage: 210/360/510/660
Not in the form of a debuff.  Initial Damage: 0
Interval: 1
Damage per Instance: 5/10/15/20 per stack
Damage Duration: 8
Number of Intervals: 8
Max Total Damage: 40/80/120/160 per stack  Initial Damage: 0
Interval: 0.5
Damage per Instance: 5.75/7.5/9.25/11/12.75/13/16.25 ( /36)
Damage Duration: 3
Number of Intervals: 4/5/6/7/8/9/10 ( /11)
Max Total Damage: 138/225/333/462/612/783/975 ( /1188)
The debuffs from each interval fully stack and do not refresh each other. Main damage was not counted.  Initial Damage: 0
Interval: 0.5
Damage per Instance: 10/20/30/40
Damage Duration: 5
Number of Intervals: 10
Max Total Damage: 100/200/300/400  Initial Damage: 0
Interval: 0.5
Damage per Instance: 6/8/10/12
Damage Duration: 5
Number of Intervals: 10
Max Total Damage: 60/80/100/120  Initial Damage: 0
Interval: 1
Damage per Instance: 5% of damage taken
Damage Duration: 10
Number of Intervals: 10
Max Total Damage: 50% of damage taken
The damage to allies is not lethal.  Initial Damage: 0
Interval: 0.2
Damage per Instance: 9.375/18.75/28.125/37.5
Damage Duration: 1.6
Number of Intervals: 8
Max Total Damage: 75/150/225/300  Initial Damage: 9/18/27/36 (12.6/25.2/37.8/50.4 to buildings)
Interval: 0.25
Damage per Instance: 9/18/27/36 (12.6/25.2/37.8/50.4 to buildings)
Damage Duration: 9.75
Number of Intervals: 39
Max Total Damage: 360/720/1080/1440 to units, 504/1008/1512/2016 to buildings
Not in the form of a debuff.  Initial Damage: Lucent Beam damage
Interval: 0.6 ( 0.3)
Damage per Instance: Lucent Beam damage
Damage Duration: 2.4/4.2/6 ( 1.5/3.3/5.1)
Number of Intervals: 4/7/10 ( 5/11/17)
Max Total Damage: 5/8/11 ( 6/12/18) × Lucent Beam damage
Not in the form of a debuff.  Initial Damage: 0
Interval: 1
Damage per Instance: 10/20/30/40
Damage Duration: 2
Number of Intervals: 2
Max Total Damage: 20/40/60/80  Initial Damage: 0
Interval: 0.2
Damage per Instance: 0.12%/0.2%/0.28%/0.36% of max HP
Damage Duration: Indefinite
Number of Intervals: Indefinite
Max Total Damage: Indefinite
The time intervals are set for the whole game when Heartstopper Aura is learned the first time.  Initial Damage: 0
Interval: 1
Damage per Instance: 26/34/42/50
Damage Duration: 5/6/7/8
Number of Intervals: 5/6/7/8
Max Total Damage: 130/204/294/400  Initial Damage: 0
Interval: 1
Damage per Instance: 10/30/50/70
Damage Duration: 4
Number of Intervals: 4
Max Total Damage: 40/120/200/280  Initial Damage: 0
Interval: 1
Damage per Instance: 10/30/50/70
Damage Duration: 4
Number of Intervals: 4
Max Total Damage: 40/120/200/280  Initial Damage: 0
Interval: 0.2
Damage per Instance: 10/15/20/25 (+ 0.34/0.52/0.69/0.86 each 0.2 seconds) + 1.25%/2.5%/3.75%/5% (+ 0.04%/0.09%/0.13%/0.17% each 0.2 seconds) of max HP.
Damage Duration: 6
Number of Intervals: 30
Max Total Damage: 90/135/180/225 + 11.25%/22.5%/33.75%/45% of max HP  Initial Damage: 0
Interval: 1
Damage per Instance: 60/90/120
Damage Duration: 6
Number of Intervals: 6
Max Total Damage: 360/540/720  Initial Damage: 60/90/120 + 30%/40%/50% of STR
Interval: 1
Damage per Instance: 60/90/120 + 30%/40%/50% of STR
Damage Duration: 2 (heroes), 5 (creeps)
Number of Intervals: 2 (heroes), 5 (creeps)
Max Total Damage: 180/270/360 + 90%/120%/150% of STR (heroes), 360/540/720 + 180%/240%/300% of STR (creeps)  Initial Damage: 0
Interval: 0.2
Damage per Instance: 6/12/18/24
Damage Duration: Indefinite
Number of Intervals: Indefinite
Max Total Damage: Indefinite
The time intervals are set for the whole game when Rot gets toggled the first time.  Initial Damage: 50/75/100/125
Interval: 3
Damage per Instance: 30/40/50/60
Damage Duration: 15
Number of Intervals: 5
Max Total Damage: 200/275/350/425
Affected units under 25% health can be denied.  Initial Damage: 0
Interval of Pulses: 0.5/0.375/0.3
Damage per Pulse: 110
Number of Pulses: 6/8/10
Max Total Damage: 660/880/1100  Initial Damage: 12.5/25/37.5/50
Interval: 0.5
Damage per Instance: 12.5/25/37.5/50
Damage Duration: 49.5
Number of Intervals: 99
Max Total Damage: 1250/2500/3750/5000  Initial Damage: 4.286/5.714/6.512/7.2
Interval: 0.1
Damage per Instance: 4.286/5.714/6.512/7.2
Damage Duration: 2.7/3.4/4.2/4.9
Number of Intervals: 27/34/42/49
Max Total Damage: 120/200/280/360  Initial Damage: 0
Interval: 1
Damage per Instance: 14/22/30/38
Damage Duration: 6
Number of Intervals: 6 (+4 per penalty)
Max Total Damage: 84/132/180/228 (+56/88/120/152 per penalty)  Initial Damage: 7.5/15/22.5/30
Interval: 0.1
Damage per Instance: 7.5/15/22.5/30
Damage Duration: 0.9
Number of Intervals: 9
Max Total Damage: 75/150/225/300
Not in the form of a debuff.  Initial Damage: 15/35/55/75
Interval: 1
Damage per Instance: 15/35/55/75
Damage Duration: 10
Number of Intervals: 10
Max Total Damage: 165/385/605/825  Initial Damage: 0
Interval: 1
Damage per Instance: 8
Damage Duration: 2 for heroes, 6 for creeps
Number of Intervals: 2 for heroes, 6 for creeps
Max Total Damage: 16 to heroes, 48 to creeps  Initial Damage: 0
Interval: 1
Damage per Instance: 60
Damage Duration: 3 for heroes, 9 for creeps
Number of Intervals: 3 for heroes, 9 for creeps
Max Total Damage: 180 to heroes, 540 to creeps  Initial Damage: 0
Interval: 0.25
Damage per Instance: 45 when close, 15 when far
Damage Duration: 40
Number of Intervals: 160
Max Total Damage: 1800 when close, and 600 when far
Not in the form of a debuff.  Initial Damage: 0
Interval: 0.5
Damage per Instance: 50/75/100
Damage Duration: Indefinite
Number of Intervals: Indefinite
Max Total Damage: Indefinite  Initial Damage: 0
Interval: 0.5
Damage per Instance: 50/75/100
Damage Duration: Indefinite
Number of Intervals: Indefinite
Max Total Damage: Indefinite  Initial Damage: 0
Interval: First interval is 0.5, the rest are 0.25
Damage per Instance: 25/45/65/75
Damage Duration: 1
Number of Intervals: 4
Max Total Damage: 100/180/260/300
Not in the form of a debuff.  Initial Damage: 0
Interval: 0.75
Damage per Instance: 15/30/45/60
Damage Duration: 4.5
Number of Intervals: 6
Max Total Damage: 90/180/270/360  Initial Damage: 175
Interval: 1
Damage per Instance: 175
Damage Duration: 2/3/4
Number of Damage Intervals: 2/3/4
Max Total Damage: 525/700/875  Initial Damage: 25/40/55/70 (wave), 0 (burn)
Interval: 1
Damage per Instance: 25/40/55/70 (wave), 0.75%/1.5%/2.25%/3% HP (burn)
Damage Duration: 5 (wave), 2 (burn)
Number of Intervals: 5 (wave), 2 (burn, 8 max per cast)
Max Total Damage: 75/250/425/600 (wave), 1.5%/3%/4.5%/6% HP (burn, 6%/12%/18%/24% max per cast)
Wave not in the form of a debuff.  Initial Damage: 25/50/75/100
Interval: 3
Damage per Instance: 10/40/70/100
Damage Duration: 15
Number of Intervals: 5
Max Total Damage: 75/250/425/600
Affected units under 25% health can be denied.  Initial Damage: 6/12/18/24
Interval: 1
Damage per Instance: 5/10/15/20
Damage Duration: 6/9/12/15
Number of Intervals: 6/9/12/15
Max Total Damage: 42/120/234/384
Plague Ward also has this ability.  Initial Damage: 0
Interval: 1
Damage per Instance: 10/15/20/25
Damage Duration: 4
Number of Intervals: 4
Max Total Damage: 40/60/80/100  Initial Damage: 0
Interval: 1
Damage per Instance: 10/16/22/28
Damage Duration: 2
Number of Intervals: 2
Max Total Damage: 20/32/44/56  Initial Damage: 0
Interval: 1
Damage per Instance: 60/100/145
Damage Duration: 5
Number of Intervals: 5
Max Total Damage: 300/500/725  Initial Damage: 0
Interval: 1
Damage per Instance: 2
Damage Duration: 10 for heroes, 20 for creeps
Number of Intervals: 10 for heroes, 20 for creeps
Max Total Damage: 20 to heroes, 40 to creeps
The damage is not lethal.  Initial Damage: 0
Interval: 1
Damage per Instance: 15/25/35/45
Damage Duration: 12
Number of Intervals: 12
Max Total Damage: 180/300/420/540  Initial Damage: 0
Interval: 1
Damage per Instance: 30/40/50
Damage Duration: 60
Number of Intervals: 60
Max Total Damage: 1800/2400/3000  Initial Damage: 20
Interval: 1.25/1.1/0.95/0.8
Damage per Instance: 20
Damage Duration: 16
Number of Intervals: 12/14/16/20
Max Total Damage: 260/300/340/420  Initial Damage: 0
Interval: 1
Damage per Instance: 8% of current HP
Damage Duration: 5
Number of Intervals: 5
Max Total Damage: 34.09% of current HP  Initial Damage: 0
Interval: 1 (flat), 4 (burst, 3.9 after impact)
Damage per Instance: 5/10/15/20 (flat), 16%/24%/32%/40% (burst)
Damage Duration: 12 (flat), 11.9 (burst)
Number of Intervals: 12 (flat), 3 (burst)
Max Total Damage: 60/120/180/240 + 48%/72%/96%/120% of lost HP
Checks the affected units' current health each time the curse is applied.  Initial Damage: 50/100/150/200
Interval: 2 after impact, 1 after first tick.
Damage per Instance: 20/35/50/65
Damage Duration: 3
Number of Intervals: 2
Max Total Damage: 90/170/250/330
Items that deal damage over time[edit]
 Initial Damage: 0
Interval: 0.11
Damage per Instance: 5
Duration: Indefinite
Number of Intervals: Indefinite
Max Total Damage: Indefinite
Refers to the health cost. Not in the form of a debuff. Nonlethal. Reduces the unit's HP to a minimum of 1.  Initial Damage: 0
Interval: 1
Damage per Instance: 5
Duration: 3
Number of Intervals: 3
Max Total Damage: 15  Initial Damage: 0
Interval: 1
Damage per Instance: 50
Duration: Indefinite
Number of Intervals: Indefinite
Max Total Damage: Indefinite  Initial Damage: 0
Interval: 1
Damage per Instance: 18.75
Duration: 8
Number of Intervals: 8
Max Total Damage: 150
