Gengar (38/111) [Sun & Moon: Crimson Invasion] Elemental Hero Collection 2 you can Tribute 1 monster

you can Tribute 1 monster to have this card gains ATK equal to the original ATK of the Tributed monster until the End Phase of this turn

you can Special Summon 1 "Ancient Gear Golem" from your Graveyard

you can return any number of face-up cards you control to the owner's hand

Set: The Lost Millennium Card type: Normal Spell Rarity: Ultimate Rare Pay 800 Life Points

Set: Cybernetic Revolution Card type: Fusion/Effect Monster Rarity: Ultimate Rare Attack: 2800 Defense: 2100 "Cyber Dragon" + "Cyber Dragon" A Fusion Summon of this card can only be conducted with the above Fusion Material Monsters

Gengar (38/111) [Sun & Moon: Crimson Invasion] Elemental Hero Collection 2 you can Tribute 1 monsterSet: Sun & Moon: Crimson Invasion Type: Psychic Rarity: Holo Rare Retreat cost: 0