Mermaid Archer

Level 3 WATER/Sea Serpent Effect
1200 ATK / 200 DEF

Once per turn: You can target 1 face-up Level 3 or lower monster you control; equip that target to this card. (You can only equip 1 monster at a time to this card with this effect.) While equipped with a monster by this effect, this card gains 800 ATK. If this card would be destroyed, you can destroy the monster equipped to it with this effect, instead.

Rulings – Yugipedia

Printings:

Raging Battle: RGBT-EN036 (Common) - 2009-05-12
Realm of the Sea Emperor Structure Deck: SDRE-EN011 (Common) - 2012-10-11

Prices:

Cardmarket: 0.12 €
TCGplayer: $ 0.21