Adaptation

This has been removed from Heroes of the Storm.

Adaptation [Passive]
Tier 3 (Hero Level 7)

Ravage can be used to jump to allies, refunding 50% of the cooldown and 100% of the Mana cost.

Kerrigan

Patch changes

•  (Patch July 12, 2016) Note: Mana refund increased from 50% to 100%.
•  (Patch August 18, 2015) Note: Half of Ravage’s Mana cost is now refunded when jumping to an ally.