Machina Peacekeeper

Level 2 EARTH/Machine Union Effect
500 ATK / 400 DEF

When this card on the field is destroyed and sent to the GY: You can add 1 Union monster from your Deck to your hand. Once per turn, you can either: Target 1 Machine monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. If the equipped monster would be destroyed by battle or card effect, destroy this card instead.

Rulings – Yugipedia

Printings:

Machina Mayhem Structure Deck: SDMM-EN003 (Super Rare) - 2010-02-19
Structure Deck: Mechanized Madness: SR10-EN006 (Common) - 2020-04-16
Speed Duel: Battle City Box: SBCB-EN072 (Common) - 2020-11-26

Prices:

Cardmarket: 0.16 €
TCGplayer: $ 0.19