Cliff Authority Retainer, Blockade Ganga (V-SS09/SP09EN) [Revival Selection]

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