Gray Ogre [Alpha Edition] Gatecrash Promos You can only use this

You can only use this effect of "Mathmech Subtraction" once per turn

—Femeref adage

then if it was an Xyz Monster

Set: Maximum Gold Card type: Normal Spell Rarity: Gold Rare Add 1 Level 4 or lower Warrior monster from your Deck to your hand

Set: The Lost Millennium Card type: Equip Spell Rarity: Ultimate Rare You can only equip this card to a monster on your opponent's side of the field

Gray Ogre [Alpha Edition] Gatecrash Promos You can only use thisSet: Alpha Edition Type: Creature Ogre Rarity: Common Cost: {2}{R} The Ogre philosopher Gnerdel believed the purpose of life was to live as high on the food chain as possible. She refused to eat vegetarians, and preferred to live entirely on creatures that preyed on sentient beings.