Ivern, Old God

Whenever Azlask, the Swelling Scourge or another colorless creature you control dies, you get an experience counter.
{w}{u}{b}{r}{g}: Creatures you control get +X/+X until end of turn, where X is the number of experience counters you have. Scions and Spawns
you control gain indestructible and annihilator 1 until end of turn.

"Nature isn't always gentle"