Swordmaster Onze

Whenever Swordmaster Onze attacks, flip a coin. If heads, he gains double strike until end of turn. If tails, he gets +2/+0 and menace instead.

Whenever Onze deals combat damage to a player, discard a card, then draw two cards.

Whenever an opponent casts a spell targeting Onze, you may pay {1}. If you do, counter that spell unless its controller pays {2}.