Vessel for the Dragon Cycle [MP20-EN131] Common XY136 you can substitute this card

you can substitute this card for a Tribute(s)

Set: Double Diamond Card type: Digimon Rarity: Super Rare Digi type: Mutant Play Cost: 7 Form: Ultimate Attribute: Data Digivolve Cost: 3 Digivolve Cost Level: 4 ＜Decoy (Black)＞ (When one of your other black Digimon would be deleted by an opponent's effect

You can only use each effect of "Crystron Sulfefnir" once per turn

except "Unchained Soul of Rage"

Set: Spirit Warriors Card type: Normal Trap Rarity: Super Rare When a Spell/Trap Card that is already face-up on your opponent's field activates its effect: Destroy that card

Vessel for the Dragon Cycle [MP20-EN131] Common XY136 you can substitute this cardSet: 2020 Tin of Lost Memories Card type: Normal Spell Rarity: Common Send 1 Wyrm monster from your Deck to the GY, then, if you control a face up non Effect Monster, you can add from your Deck to your hand 1 "Tenyi" monster with a different name from the monster sent to the GY. You can only activate 1 "Vessel for the Dragon Cycle" per turn.