Tree Otter

Level 2 WATER/Beast Effect
1200 ATK / 100 DEF

Once per turn: You can target 1 face-up monster you control; it gains 1000 ATK until the end of this turn. You must control a Beast-Type monster (other than this card) to activate and to resolve this effect.

Rulings – Yugipedia

Printings:

Raging Battle: RGBT-EN095 (Rare) - 2009-05-12
Battle Pack 3: Monster League: BP03-EN062 (Common) - 2014-07-31
Battle Pack 3: Monster League: BP03-EN062 (Shatterfoil Rare) - 2014-07-31

Prices:

Cardmarket: 0.18 €
TCGplayer: $ 0.36