Koa'ki Meiru War Arms [RGBT-EN081] Super Rare XY138 if this card was Fusion

if this card was Fusion Summoned using a Pendulum Monster as Material

In that case

you can Tribute 1 DARK monster your opponent controls

Set: Speed Duel: Duelists of Tomorrow Card type: Equip Spell Rarity: Common Equip only to a Warrior monster

Sauron forged a booster—one far more powerful than those owned by Elf

Koa'ki Meiru War Arms [RGBT-EN081] Super Rare XY138 if this card was FusionSet: Raging Battle Card type: Effect Monster Rarity: Super Rare Attack: 1400 Defense: 1200 During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Warrior Type monster in your hand. Once per turn, you can select 1 Level 3 or lower Warrior Type monster in your Graveyard and equip it to this card. This card gains ATK equal to half of those equipped cards' combined ATK.