Attack Pheromones

Continuous Spell

If a monster you control attacks a Defense Position monster, change that monster to face-up Attack Position at the end of the Damage Step if your attacking monster is Reptile-Type.

Rulings – Yugipedia

Printings:

Stardust Overdrive: SOVR-EN048 (Common) - 2009-11-17

Prices:

Cardmarket: 0.08 €
TCGplayer: $ 0.10