Portcullis [Stronghold] Sarkhan Set: Commander 2011 Type: Instant

Set: Commander 2011 Type: Instant Rarity: Rare Cost: {U} Counter target instant or sorcery spell unless its controller pays {1}

and then you're done

if you control four or more creatures

Sacrifice Ashnod's Coupon: Target player gets you target drink

At the beginning of your next upkeep

Portcullis [Stronghold] Sarkhan Set: Commander 2011 Type: InstantSet: Stronghold Type: Artifact Rarity: Rare Cost: {4} Whenever a creature enters the battlefield, if there are two or more other creatures on the battlefield, exile that creature. Return that card to the battlefield under its owner's control when Portcullis leaves the battlefield.