Defend with everything you've got, and then use that power to counterattack.
[G Guardian]-Opponent Turn's Guard Step-[COST][Discard a card with [Heal] from your hand], and call this card to your (GC) from face down. [AUTO]:When this unit is put on (GC), [COST][retire any number of rear-guards], and this unit gets [Shield] +10000 until end of that battle for each unit retired for this cost. Draw a card for each unit with equip gauge retired for this cost.