Kaito, the Gum-Trapper

At the beginning of your precombat main phase,
flip a coin. If you win the flip, create a Treasure
token. Otherwise, you lose 2 life.
Whenever a creature deals combat damage to
you, that creature gets a gum counter.
Creatures with gum counters on them don't
untap during their controller's untap steps and
have "{2}: Remove a gum counter from this
creature."