Vriktazhan, Dustwaker

Prowess, annihilator 1
Whenever a creature enters the battlefield because of an Eldrazi's combat damage or ability, return that creature to the battlefield under your control, except it's colorless and is an Eldrazi in addition to its other types.
{p/c}{p/c}{p/c}{3}: Destroy target creature.
"Do not worry, fallen warriors. You will serve a great cause."