Emissary of the Oasis

Level 3 LIGHT/Spellcaster Effect
600 ATK / 400 DEF

While a face-up Level 3 or lower Normal Monster is on your side of the field, your opponent cannot select this card as an attack target. While this card is face-up on your side of the field, any Battle Damage to the controller of this card from battle involving a Level 3 or lower Normal Monster becomes 0.

Rulings – Yugipedia

Printings:

Ancient Sanctuary: AST-083 (Common) - 2004-06-01
Dark Revelation Volume 2: DR2-EN196 (Common) - 2005-10-20

Prices:

Cardmarket: 0.14 €
TCGplayer: $ 0.22