Test Tiger (LCGX-EN242) - Legendary Collection 2 Unlimited

If you control a face-up "Gladiator Beast" monster, you can Special Summon this card (from your hand). You can Tribute this card to target 1 face-up "Gladiator Beast" monster you control; shuffle that target into the Deck, then Special Summon 1 "Gladiator Beast" from your Deck, and treat it as if it was Special Summoned by the effect of a "Gladiator Beast" monster.