UA Blockbacker [SECE-EN088] Rare

You can Special Summon this card (from your hand) by returning 1 “UA” monster you control to the hand, except “UA Blockbacker”. You can only Special Summon "UA Blockbacker" once per turn this way. Once per turn, when your opponent Special Summons a monster(s): You can change their battle positions, and if you do, negate their effects.