Race

Draenei

Blessing of the Naaru · levels at 2 / 4 different pieces

2
Every 4s, each Draenei hits the nearest enemy for 50 + 2% of that enemy's max HP as pure damage and heals itself for the same amount.
4
All allies store the healing they receive. Once 100 or more is stored, it is released as pure damage (up to 300) to every enemy within 300 range. 5s cooldown.
Note: The tooltip says the damage is split among nearby enemies. In fact every enemy within range takes the full amount (max 300, 5-second cooldown).

Official in-game tooltip

SPECIES TRAIT: Blessing of the Naaru
Active when you have at least (N) different pieces of this species on board. (Multiple effects stack)

(2) Draeneis: All friendly Draenei gain the effect: Every 4 seconds, steal 50+2% max health from the nearest enemy chess piece to heal themselves.
(4) Draeneis: All friendly pieces gain effects: Whenever a cumulative total of more than 100 points of healing is taken it is split (cumulative healing) points of pure damage among the surrounding enemies.

To evade the Burning Legions clutches, a congregation led by the Farseer fled their homelands, faithful to the Naaru and the Holy Light. They named themselves Draenei, the Exiled Ones.