The Ironclad

You may pay 6 life when casting this spell, if you do so you do not pay commander tax. If at least 3 Black mana was spent to cast this spell, this creature enters with a Lifelink and a Menace counter, if at least 3 red mana was spent to cast this spell, this creature enters with a Trample counter and gains Haste until end of turn. Whenever this creature attacks, if it has at least 9 power, it gains Flying and Double-Strike until end of turn. Whenever this creature deals combat damage to a player put a +1/+1 counter on it.