Goblin's March

Affinity for Goblins (This spell costs {1} less to cast
for each Goblin you control.)
Buyback {r} (You may pay an additional {r} as you
cast this spell. If you do, put this card into your hand
as it resolves.)
Create two 1/1 red Goblin creature tokens. Then
flip a coin. If you lose the flip, discard a card at
random.