Qadshaddoll Keios

Level 2 LIGHT/Spellcaster Flip Effect
900 ATK / 100 DEF

FLIP: You can Special Summon 1 "Shaddoll" monster from your hand in face-up or face-down Defense Position.
If this card is sent to the GY by a card effect: You can send 1 "Shaddoll" monster from your hand to the GY, and if you do, for the rest of this turn, all monsters you control gain ATK/DEF equal to the original Level of that monster sent to the GY x 100. You can only use 1 "Qadshaddoll Keios" effect per turn, and only once that turn.

Rulings – Yugipedia

Printings:

Structure Deck: Shaddoll Showdown: SDSH-EN001 (Super Rare) - 2020-02-13
2021 Tin of Ancient Battles: MP21-EN243 (Ultra Rare) - 2021-09-30

Prices:

Cardmarket: 0.10 €
TCGplayer: $ 0.12