Worm Gulse

Level 4 LIGHT/Reptile Effect
1500 ATK / 300 DEF

Each time a face-down Defense Position monster is flipped face-up, place 1 Worm Counter on this card. This card gains 300 ATK for each Worm Counter on it.

Rulings – Yugipedia

Printings:

Duel Terminal 1: DT01-EN081 (Duel Terminal Normal Parallel Rare) - 2010-01-29
Gold Series 3: GLD3-EN035 (Common) - 2010-06-18

Prices:

Cardmarket: 0.12 €
TCGplayer: $ 0.22