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![Relentless Rats (Borderless) [Secret Lair Showdown] 62 it is unaffected by any](https://cdn.shopify.com/s/files/1/0876/8225/3078/files/bf0b4b2e-9796-5593-9a90-c4b35148d6f4.png?v=1770145498)
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it is unaffected by any Spell Cards
using it as the Fusion Material
Set: Black & White: Black Star Promos Type: Grass Rarity: Black Star Promo Retreat cost: Colorless
You can only activate 1 "Harmonic Synchro Fusion" per turn
negate that activation
Relentless Rats (Borderless) [Secret Lair Showdown] 62 it is unaffected by anySet: 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.
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