Simone, Apex of Distraction

Mutate {g/u}{r} (If you cast this spell for its mutate
cost, put it over or under target non-Human creature
you own. They mutate into the creature on top plus
all abilities from under it.)
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Whenever this creature mutates, you may tap it.
If you do, gain control of target non-Human
creature an opponent controls until end of
turn. Untap it. It gains hexproof until
end of turn.