Gambit, Cajun Card Sharp

When Gambit, Cajun Card Sharp or another
Mutant enters the battlefield under your control,
draw a card.
Discard X cards, {t}: Deal X damage to target
creature. When that creature dies this turn,
draw a card.
Threshold—As long as there are seven or more
cards in your graveyard, Gambit, Cajun Card
Sharp gets +2/+2.