Advanced format ruling
Gladiator Beast Bestiari
Card effect (current official text)If this card is Special Summoned by the effect of a "Gladiator Beast" monster: Target 1 Spell/Trap Card on the field; destroy that target. At the end of the Battle Phase, if this card attacked or was attacked: You can shuffle it into the Deck; Special Summon 1 "Gladiator Beast" monster from your Deck, except "Gladiator Beast Bestiari".
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.