Obelisk the Tormentor [JUMP-EN037] Ultra Rare Promo You can only use this

You can only use this effect of "Iron Knight" once per turn

it gains 300 ATK/DEF for each material attached to this card

immediately after this effect resolves

Then Set all face-up monsters on the field

except "Valerifawn

Obelisk the Tormentor [JUMP-EN037] Ultra Rare Promo You can only use thisSet: Shonen Jump Magazine Promos Card type: Effect Monster Rarity: Ultra Rare Attack: 4000 Defense: 4000 You must Tribute 3 monsters to Normal Summon this card (you cannot Set this card). The Normal Summon of this card cannot be negated. When this card is Normal Summoned, Spells, Traps, and Effect Monster effects cannot be activated. This card cannot be targeted by the effects of Spells, Traps or Effect Monsters. If this card is Special Summoned, it