Card Guard (SDGU-EN021) - Structure Deck: Gates of the Underworld Unlimited

When this card is Normal or Special Summoned, place 1 Guard Counter on it. This card gains 300 ATK for each Guard Counter it has. Once per turn, you can remove 1 "Guard Counter" from this card and place it on 1 other face-up card you control. If that card would be destroyed, remove the "Guard Counter" instead.