Raid Boss - Extended Rules

Your commander starts the game on the battlefield tapped with X stun counters, where X is half of its mana cost, rounded up. You can pay its mana cost to remove all stun counters from it, but only the ones from this effect. Any triggers they would have for entering the battlefield immediately will instead apply when your commander first untaps. Your commander can choose to attack a target creature instead of a player or planeswalker, but other creatures can still defend it. Whenever you tap a land for mana, add an additional mana of any color. During your draw step, you can discard a card to draw a card. This can only be used once per turn.