Your search for "Last Counter PRIO-EN071" revealed the following:
Last Counter - PRIO-EN071 - Common - Unlimited from Primal Origin Unlimited, available at 401 Games Canada. Rarity: Common Card Text:When an attack is declared involving a "Battlin' Boxer" monster you control and an opponent's monster, if you control another...
Last Counter - PRIO-EN071 - Common - 1st Edition from Primal Origin 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:When an attack is declared involving a "Battlin' Boxer" monster you control and an opponent's monster, if you...