"Gladiator Beast Vespasius" + 2 "Gladiator Beast" monsters Must first be Special Summoned (from your Extra Deck) by shuffling the above cards you control into the Deck. (You do not use "Polymerization".) Once per turn, when your opponent activates a monster effect (Quick Effect): You can negate the activation, and if you do, destroy it. You choose the attack targets for your opponent's attacks. At the end of the Battle Phase, if this card battled: You can return this card to the Extra Deck; Special Summon 1 "Gladiator Beast" monster from your Deck.
Special Summons only 1 Gladiator Beast when returned to the Extra Deck. Weak defense stat.
The attack target changing essentially prevents your opponent from attacking as long as you control one very powerful monster.
Gladiator Beast Domitianus keeps with the Gladiator Beast control strategy by providing free once per turn monster effect negation. Summoning him would be fairly easy with all the Gladiator Beasts’ swarm effects, and Gladiator Beast Vespasius’ self Special Summoning.
You will need to choose carefully which fusion monster best fits the situation because Fusion Summoning in a Gladiator Beast deck uses the same materials. Domitianus shares a similar number materials with Gladiator Beast Nerokius and Gladiator Beast Heraklinos only differing in one specific monster. Other Gladiator Beast Fusion monsters like Gladiator Beast Gyzarus will also be strong contenders.