Cliff Authority Retainer, Blockade Ganga

-Opponent Turn's Guard Step-[Choose a card with "[Heal] Heal" from your hand, and discard it] Call this card to your from face down. :[Choose one of your rear-guards, and retire it] When this unit is placed on , you may pay the cost. If you do, this unit gets +10000 until end of that battle. Choose up to two of your rear-guards, and until end of turn, they get ":When this unit is retired, return this card to your hand.".