Helm of the Host [Dominaria] BW12 You can only use each

You can only use each effect of "Duoterion" once per turn

R Manga Promo Card type: Effect Monster Rarity: Ultra Rare Attack: 2500 Defense: 1500 When this card is Tribute Summoned

Set: Tactical Evolution Card type: Trap Card Rarity: Ultimate Rare Activate only when your opponent's monster declares an attack targeting a face-up "Elemental Hero" monster you control

Set: Dark Revelation Volume 1 Card type: Normal Monster Rarity: Super Rare Attack: 1900 Defense: 1200 This monster can only be Ritual Summoned with the Ritual Spell Card

Helm of the Host [Dominaria] BW12 You can only use eachSet: Dominaria Type: Legendary Artifact Equipment Rarity: Rare Cost: {4} At the beginning of combat on your turn, create a token that's a copy of equipped creature, except the token isn't legendary if equipped creature is legendary. That token gains haste. Equip {5} Forged out of flowstone for the queen of Vesuva.