During the Battle Phase: Shuffle into the Deck, from your hand, field, or GY, the Fusion Materials that are listed on a "Gladiator Beast" Fusion Monster, then Special Summon that Fusion Monster from your Extra Deck, ignoring its Summoning conditions.
You can only activate 1 "Gladiator Beast United" per turn.
You cannot declare attacks the turn you activate this card, except with "Gladiator Beast" monsters.