Gengar (38/111) [Sun & Moon: Crimson Invasion] OTS Tournament Pack 6 you can Special Summon that

you can Special Summon that monster to your side of the field in face-up Defense Position

Set: Secrets of Eternity Card type: Ritual/Effect Monster Rarity: Ghost Rare Attack: 2700 Defense: 2200 You can Ritual Summon this card with "Good & Evil in the Burning Abyss"

You must also offer monsters whose total Level Stars equal 7 or more as a Tribute from the field or your hand

Set: Shadow of Infinity Card type: Effect Monster Rarity: Ultimate Rare Attack: 100 Defense: 100 If this card is in your Graveyard during your Standby Phase and there are no Spell or Trap Cards on your side of the field

Gengar (38/111) [Sun & Moon: Crimson Invasion] OTS Tournament Pack 6 you can Special Summon thatSet: Sun & Moon: Crimson Invasion Type: Psychic Rarity: Holo Rare Retreat cost: 0