If your mutated creature leaves play and then comes back (say, due to Thassa, Deep-Dwelling), then the cards in the pile come back into play as new, separate creatures
So this single card, which has a single entry in Gatherer, actually has 10 total distinct printings for our counting purposes
Fortunately this deck is stacked with rares and mythics, so youre not lacking on power, but whereas before you would often opt to grind people out with Hangarback Walker, Archangel Avacyn, and Evolutionary Leap, now you are trying to go wide and press your advantage with Verdurous Gearhulk
You'd totally get belly rubs if it wouldn't singe my hand
In two-player formats, Faerie Mastermind only offers two extra cards per turn cycle
Lets set aside the argument of what would be better in Legacy (spoiler: Mind Twist), despite the fact that Dark Ritual, Ancient Tomb, and City of Traitors are all legal