Blek'Tekal, Mutant Excellence

Mutate: {4}{u}{g}, Sacrifice a creature.
Blek'Tekal, Mutant Excellence can only be cast for it's Mutate cost.
When Blek'Tekal, Mutant Excellence mutates, mutate the creature sacrificed this way under Blek'Tekal, Mutant Excellence.
Blek'Tekal, Mutant Excellence has the text boxes of each creature you control with Mutate.