Happy Mask Salesman

{1},{t}: Sell. (Choose target opponent. That player
creates a colorless Mask artifact token with
"{2},{t}, Sacrifice this artifact: Flip a coin. If you win
the flip, draw a card and gain 2 life. Otherwise,
create a Treasure token and lose 2 life.")
Whenever a player flips a coin, if they win the
flip, you may draw a card and gain 2 life. If they
lose the flip, you may pay 2 life and create a
Treasure token.