Red Dragon Archfiend/Assault Mode (UTR) [CRMS-EN004] Ultimate Rare Hidden Arsenal 3 you must select it as

you must select it as an attack target

Set: HeartGold & SoulSilver: Base Set Type: Supporter Rarity: Uncommon

This card's maximum number of attacks per turn equals the number of non-Tuner monsters used as its Synchro Material

Set: Astral Pack 2 Card type: Xyz/Effect Monster Rarity: Ultimate Rare Attack: 2100 Defense: 1800 2 Level 4 monsters

When the selected monster is destroyed

Red Dragon Archfiend/Assault Mode (UTR) [CRMS-EN004] Ultimate Rare Hidden Arsenal 3 you must select it asSet: Crimson Crisis Card type: Effect Monster Rarity: Ultimate Rare Attack: 3500 Defense: 2500 This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except with Assault Mode Activate. If this card attacks, destroy all other monsters after damage calculation. When this card on the field is destroyed, Special Summon 1 Red Dragon Archfiend from your Graveyard.