Predaplanning

Normal Trap

Send 1 "Predaplant" monster from your Deck to the GY; place 1 Predator Counter on each face-up monster on the field, and if you do, any of those monsters that are Level 2 or higher become Level 1 as long as they have a Predator Counter. If you Fusion Summon a DARK monster while this card is in your GY (except during the Damage Step): You can banish this card from your GY, then target 1 card on the field; destroy it. You can only use each effect of "Predaplanning" once per turn.

Rulings – Yugipedia

Printings:

Legendary Duelists: Immortal Destiny: LED5-EN049 (Rare) - 2019-09-26
Legendary Duelists: Season 3: LDS3-EN081 (Common) - 2022-07-21

Prices:

Cardmarket: 0.16 €
TCGplayer: $ 0.12