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| Octarine Core|
|At the core of spellcraft are spectrums only the very gifted can sense.|
- One Octarine Core grants a total of 425 health, 700 mana, 1 mana regeneration and 1.79% spell damage (and 25 attack damage to intelligence heroes).
- Cooldown Reduction of multiple Octarine Cores does not stack.
- Reduces the cooldown of active, passive and item abilities as well as the replenish time of charge-based abilities.
- The cooldown reduction is not updated dynamically. Only abilities cast while having Octarine Core get their cooldowns reduced.
- Visually reduces the cooldown of Tranquil Boots, but does not affect it.
- When using Guardian Greaves's Mend while having Octarine Core, its heal restriction timer is reduced by 10 seconds, too.
- Spell Lifesteal of multiple Octarine Cores does not stack.
- Heals from any spell damage the owner deals (with a few exceptions) against enemy or allied units.
- Heals from all three damage types and from many instantly killing effects.
- Heals from damage dealt after all reductions.
- In order for it to heal, the damage source must be the owner. Damage done by its summons (including wards) does not heal.
Heroes whose default item build includes Octarine Core as a core or a situational item
- If you ever find yourself with a tanky hero with Radiance and don't know what else to build, don't hesitate to get Octarine Core, since it greatly boosts your health.
- Octarine is a fictional color in the comic fantasy book series Discworld, written by the late Terry Pratchett, who died just before Octarine Core was released. The color is described as "resembling a flourescent greenish-yellow purple" and can only be seen by wizards and cats.
- The components of Octarine Core are the same as the components of the pre-6.60 Aghanim's Scepter.