Spinel, The Abandoned

Unstoppable, Coercive (When this creature deals
combat damage to a player, that player discards a
card)

{w}{u}{b}{r}{g}, {t}: Exile this creature and another
target nontoken gem creature you control. Create a
creature token that has the combined colors, creature
types, power, toughness and keyword abilities of the
exiled creatures. Return the exiled cards to their
owners control when the token leaves the battlefield.
Activate only as a sorcery.