Deadfish Mate

Whenever Deadfish Mate enters the battlefield
or attacks, you may exile a creature card from
your graveyard. If you do, you lose 1 life and
create a Treasure token. (It's a colorless artifact
token with "{t}, Sacrifice this artifact: Add one
mana of any color.")
{u/b}, Sacrifice an artifact or another creature:
Deadfish Mate gets +1/+0 and gains menace
until end of turn.