The Hungry Maria

{t}: Add {c}.
Creature cards in your graveyard can't be targeted
by spells or abilities your opponent controls.
Sacrifice a creature you control: This artifact
becomes a creature until end of turn.
Tap a number of creatures with total power 10
or greater: exile The Hungry Maria, then return
it to the battlefield transformed.
"It's a bit of a legend on these seas. A place of rest for
the dead, fueled by the last breaths of the living."