Shaddoll Core

Continuous Trap

Special Summon this card as an Effect Monster (Spellcaster/DARK/Level 9/ATK 1450/DEF 1950). (This card is also still a Trap.) If Summoned this way, you can substitute this monster for 1 Fusion Material that lists an Attribute, on a "Shaddoll" Fusion Monster Card. If this card is sent to the GY by a card effect: You can target 1 "Shaddoll" Spell/Trap in your GY, except "Shaddoll Core"; add it to your hand.

Rulings – Yugipedia

Printings:

Duelist Alliance: DUEA-EN073 (Super Rare) - 2014-08-14
2015 Mega-Tin Mega Pack: MP15-EN115 (Super Rare) - 2015-09-17
Structure Deck: Shaddoll Showdown: SDSH-EN034 (Common) - 2020-02-13

Prices:

Cardmarket: 0.19 €
TCGplayer: $ 0.27