At One With the Sword

Normal Trap Card

Activate while the only monster you control is 1 face-up "X-Saber" monster. Equip this card to that monster. It gains 800 ATK. If it destroys your opponent's monster by battle, draw 1 card.

Rulings – Yugipedia

Printings:

Ancient Prophecy: ANPR-EN079 (Common) - 2009-09-01

Prices:

Cardmarket: 0.15 €
TCGplayer: $ 0.23