Delta Tri

Level 4 LIGHT/Machine Effect Monster
1200 ATK / 1000 DEF

If this card destroys an opponent's monster by battle, select and activate 1 of these effects:
● Select 1 appropriate Union monster in your Graveyard and equip it to this card.
● Select 1 face-up LIGHT Machine-Type monster you control, and return it to the Deck. Then draw 1 card.

Rulings – Yugipedia

Printings:

The Shining Darkness: TSHD-EN030 (Rare) - 2010-05-07
Speed Duel: Battle City Box: SBCB-EN073 (Common) - 2020-11-26

Prices:

Cardmarket: 0.03 €
TCGplayer: $ 0.12