This is a very convoluted strategy, though, and is very difficult to pull off
They mutate into the creature on top plus all abilities from under it.) Whenever this creature mutates, other creatures you control get +X/+X until end of turn, where X is the number of times this creature has mutated
The potential of this card in any half-decent creature deck is nearly limitless, kill-the-table type of damage
This could be anything, ranging from putting a +1/+1 counter on a creature, exiling cards off the top of your library, or even playing a permanent for free
Interestingly, the cards were stamped with the 1st Edition symbol after the print run fun fact
In the incredibly rare case where there is no legal target for the first or second mode, those modes can't be chosen at random