Card Guard [BP03-EN065] Rare

If this card is Normal Summoned or Special Summoned: Place 1 Guard Counter on it. This card gains 300 ATK for every Guard Counter on it. Once per turn: You can target 1 other face-up card you control; remove 1 Guard Counter from this card, and if you do, place 1 Guard Counter on that target (if that card would ever be destroyed remove 1 Guard Counter instead).