Leng Ling

Level 3 DARK/Dragon Union Effect
1500 ATK / 0 DEF

Once per turn, you can either: Target 1 face-up monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. The original ATK of a monster equipped with this card becomes 1000, it can make a second attack during each Battle Phase, also if the equipped monster would be destroyed by battle or card effect, destroy this card instead.

Rulings – Yugipedia

Printings:

Circuit Break: CIBR-EN034 (Common) - 2017-10-19
2018 Mega-Tin Mega Pack: MP18-EN123 (Common) - 2018-08-30
Structure Deck: Cyber Strike: SDCS-EN018 (Common) - 2021-10-14

Prices:

Cardmarket: 0.03 €
TCGplayer: $ 0.05