vintage japanese pokemon booster box “Leaders Stadium” (Gym Heroes) & Prismatic Evolutions Surprise Opening! Vintage 1997 Japanese Jungle Pack

Rally for the Throne

"Rebound" means "If this spell was cast from your hand, instead of putting it into your graveyard as it resolves, exile it and, at the beginning of your next upkeep, you may cast this card from exile without paying its mana cost."

Or how about you play Barroom Brawl and give everyone the opportunity to join the fight

Since Keruga, the Macrosage doesn't do anything after its enter-the-battlefield effect triggers, you should wait to cast it until you have a battlefield of permanent with a mana value of three or more to make sure the effect will do something impactful

Compounding this is the fact that these have a pool of 86 cards, which means the chances of pulling a specific Master Ball holo are extremely low