Venzath, Driven by Madness

Flying, deathtouch
When Venzath, Driven by Madness enters the battlefield, if you there are four or more card types among card in your graveyard, exile X creatures.
When Venzath, Driven by Madness dies, return all creatures exiled by Venzath, driven by Madness onto their controllers battlefield. They are now eldrazi horror in addition to their other types.