Gansro, the Mutanic Soul

When Gansro, the Mutanic Soul enters the
battlefield, exile target creature card in a
graveyard with mana value 3 or less.
The first token that enters the battlefield under
your control each turn is a copy of a creature
exiled by Gansro instead.
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Feasting on enough dragon souls made Gansro's
heart roar like one.