Advanced format ruling
Gladiator Beast's Battle Halberd
Card effect (current official text)Equip only to a "Gladiator Beast" monster. When it attacks, destroy 1 Spell or Trap Card at the end of the Damage Step. When the equipped monster is returned from your side of the field to the Deck and this card is sent to the Graveyard, return this card to your hand.
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.