When a Red-Eyes Monster declares an attack, this Fusion card allows you to take a Warrior Monster from the Graveyard and treat it as an Equip Card
Attack negation/prevention - You can only 'tag out' a "Gladiator Beast" when it "attacks or is attacked", therefore, any Spell, Trap, or Monster Effect that lets you negate a monster attack would prevent the opponent from tagging out their "Gladiator Beasts".
Card Set(s) -The Three Captains-[ST-10] CARD VIEW ST10-010 | SR | CHARACTER Trafalgar Law Attribute Slash Block icon 2 Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) [On Play] DON
[Edit] My guess is that Jirachi Prisms ability still works, because it states, before you put it in your hand, while Barbaracle is, instead of your hand. If Jirachi Prism heads for the bench, Barbaracle doesnt say instead of the bench, meaning it should go through
Each sealed Japanese booster box contains 20 booster packs, with 7 cards per pack