From Dota 2 Wiki
|A blade forged from rare crystals, it seeks weak points in enemy armor.|
- Increases attack damage by an average of 15%.
- The proc chances of multiple crit sources stack.
- If two sources of critical strike proc at the same time, the higher multiplier has priority.
- Critical Strike uses pseudo-random distribution.
- Before 5.40, Crystalys was named "Crystal Battlegear" and before 5.31, it was named "Crystal Defender".