Brom-Bebel, Luck's Favor

Indestructible
Whenever you flip a coin, if it lands on heads,
put a +1/+1 counter on Brom-Bebel, Luck's
Favor.
{4}, {t}: Flip a coin. If you win the flip, spells you
cast this turn cost {x} less to cast, where X is
Brom-Bebel's power. Then, add {w}{u}{b}{r}{g}. Otherwise, exile a card from your
hand at random.