Lazav, Familiar Stranger {1}{U}{B}
Legendary Creature — Shapeshifter
Whenever you commit a crime, put a +1/+1 counter on Lazav. Then you may exile a card from a graveyard. If a creature card was exiled this way, you may have Lazav become a copy of that card until end of turn. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)
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Cards that do something similar expected a card that isn't here?
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Vadmir, New Blood 97%
$0.27#8358
"Whenever you commit a crime, put a +1/+1 counter on this card. This ability triggers only once each turn."