Clowning Around

Whenever a player successfully casts a spell
on an opponent's turn, that player puts a
2/2 red Clown creature token with fool into play. (Whenever it attacks, flip a coin. If you
win the flip, create a treasure token. If you lose
the flip, the opponent you attacked with it this
turn gains control of this creature.)
"Make no mistake. It is fool's gold.."