From the new Special Pack!
Yu-Gi-Oh! Official Card Game Duel Monsters Special Pack 20th Anniversary Edition Volume 1
18SP-JP101 デーモンの降臨 Daemon no Kourin / Advent Skull Archfiend
Dark Fiend / Ritual / Effect
You can Ritual Summon this card with “Contract with the Abyss”.
(1) This card’s name is treated as “Summoned Skull” while it is in the Monster Zone. (This card is still treated as an “Archfiend” card.)
(2) This card on the field cannot be destroyed by battle with non-Ritual Monsters, and cannot be destroyed by non-Ritual Monsters’ effects.
(3) If this Ritual Summoned card in its owner’s control is sent to the GY by an opponent’s card (either by battle or card effect, or by being destroyed): You can Special Summon 1 “Summoned Skull” from your hand, Deck, or GY.