Qadshaddoll Keios (MP21-EN243) [2021 Tin of Ancient Battles]

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.