Zhol'Ruun, Endless Night

Eminence — As long as Zhol'Ruun is in the command zone or on the battlefield, at the beginning of your upkeep, you gain 1 life for each color among permanents you control.

Flying

Whenever you gain life, you may put a permanent card with mana value X or less from your hand onto the battlefield, where X is the amount of life you gained this turn.