Gambit, Mutant Dealer

Hexproof

Whenever you discard a card, Gambit, Mutant Dealer deals 2 damage to any target.

{u/r}: Discard a Card

{u}{u}{r}{r}: Draw 3 cards. Then create Gambit's Bo Staff, a legendary colorless Equipment artifact token with "Equipped Creature gets +X/+X, where X is equal to the number of cards you have discarded each turn and has First Strike and Vigilance" and Equip - Discard 3 cards.