Relentless Rats (Borderless) [Secret Lair Showdown] 62 Set: Black & White: Black

Set: Black & White: Black Star Promos Type: Grass Rarity: Black Star Promo Retreat cost: Colorless

Set: Sun & Moon: Trainer Kit - Alolan Sandslash Type: Water Rarity: Promo Retreat cost: Colorless

Set: EX: Team Rocket Returns Type: Stadium Rarity: Uncommon

" —Baron Bertram Graywater

You can only activate 1 "Harmonic Synchro Fusion" per turn

Relentless Rats (Borderless) [Secret Lair Showdown] 62 Set: Black & White: BlackSet: Secret Lair Showdown Type: Creature Rat Rarity: Rare Cost: {1}{B}{B} Relentless Rats gets +1 +1 for each other creature on the battlefield named Relentless Rats. A deck can have any number of cards named Relentless Rats. If you nourish them, they grow calamitous.