yugioh lion card : PRIO-EN026 1st Ed Mecha Phantom Beast O-Lion Rare Plant/Effect Leogun - Yu-Gi-Oh! Card Database

// Vigilance On turns where the effect of Summon: Yojimbo's second or third chapter ability is applying, your opponents can choose not to attack with a creature that must attack if able as long as there is no other player, planeswalker, or battle for that creature to attack that wouldn't require a cost

Since we're going to be milling so many cards from our deck, cards like this turn the graveyard into a resource that we can use to keep our game plan going

Regardless of whose decision it really was, it certainly isnt a popular one

Heres the collector friendly part, these are far more attainable than their reputation suggests