Telemin Performance [Conflux] Pro Tour Promos You can only use this

You can only use this effect of "Marincess Great Bubble Reef" once per turn

1 Level 7 or lower Dragon-Type Normal Monster in face-up Defense Position

that Synchro Monster loses 400 ATK and DEF at the end of the Damage Step

Set: Black & White: Base Set Type: Psychic Rarity: Promo Retreat cost: Colorless

Telemin Performance [Conflux] Pro Tour Promos You can only use thisSet: Conflux Type: Sorcery Rarity: Rare Cost: {3}{U}{U} Target opponent reveals cards from the top of their library until they reveal a creature card. That player puts all noncreature cards revealed this way into their graveyard, then you put the creature card onto the battlefield under your control.