Coral Helm [Antiquities] San Diego Comic-Con 2017 during your opponent's turn

during your opponent's turn

each player Tributes 1 face-up monster on his /her side of the field and inflicts damage to the opponent's Life Points equal to half of the original ATK of the Tributed Monster

this card gains 300 ATK for each card banished by this effect

Set: Black & White: Next Destinies Type: Lightning Rarity: Holo Rare Retreat cost: Colorless

Set: Nintendo: Black Star Promos Type: Fire Rarity: Black Star Promo Retreat cost: Colorless

Coral Helm [Antiquities] San Diego Comic-Con 2017 during your opponent's turnSet: Antiquities Type: Artifact Rarity: Rare Cost: {3} {3}, Discard a card at random: Target creature gets +2 +2 until end of turn.