Doublebyte Dragon

Level 0 DARK/Cyberse Link Monster
1500 ATK

2 Link Monsters
Gains ATK equal to the combined Link Ratings of the monsters used for its Link Summon x 300. Unaffected by monster effects, except Link Monsters' effects, and cannot be destroyed by battle, except by battle with a Link Monster.

Rulings – Yugipedia

Printings:

Duel Power: DUPO-EN020 (Ultra Rare) - 2019-04-03

Prices:

Cardmarket: 0.12 €
TCGplayer: $ 0.19