Dracotail Sting

This spell costs {G}{G}{G} less to cast if there are ten or more creatures on the battlefield. Exile up to two target cards from graveyards, then you may put a Dracotail card from your graveyard or exile on the bottom of its owner’s library. If you do, draw a card. Until your next turn, you can’t cast spells named Dracotail Sting.