Ultimate Buddy!

Generic Choose one of your rear-guards, and put this card into that unit's Buddy Soul. :If this card is in your rear-guard's Buddy Soul, that unit gets ":[Soulguard] (When this unit would leave a , you can put a card from this unit's Buddy Soul into drop to have it stay on the ". :During your opponent's turn's guard step, this card can be called to as a trigger unit, and it becomes a Grade 0/15000 guardian.