Helm of the Host [Dominaria] SWSH131 You can only Special Summon

You can only Special Summon "Black Dragon Collapserpent" once per turn this way

and this card gains that same amount of ATK

Set: Gold Series 4: Pyramids Edition Card type: Effect Monster Rarity: Gold Rare Attack: 2800 Defense: 2300 If there are 4 or more DARK monsters with different names in your Graveyard

Set: Structure Deck: Rise of the Dragon Lords Card type: Normal Spell Rarity: Common Attack: 0 Defense: 0 Select 1 monster from your Deck and send it to the Graveyard

Helm of the Host [Dominaria] SWSH131 You can only Special SummonSet: 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.