union arena demon slayer booster box TCG: Kimetsu No Yaiba 1st Edition [UE05BT] sealed randomly into each booster packs BANDAI UNION ARENA Booster Pack,

SR Super Rare UR Ultra Rare SE Secret Rare UL Ultimate Rare PS Platinum Secret Rare CR COLLECTOR'S RARE QCSE Quarter Century Secret Rare Egyptian God Slime X WATER Level 10 [ AquaFusionEffect ] ATK 3000 DEF 3000 1 Aqua monster + 1 Level 10 WATER monster Must first be either Fusion Summoned, or Special Summoned from your Extra Deck by Tributing 1 Level 10 Aqua monster with 0 ATK

Because their rate is relatively weak, the below-rate redundant spells tend to ride sideboards the majority of the time instead of seeing meaningful play

This is important, since you need to build up its power over time

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