Edison format ruling
Machina Peacekeeper
Card text as printed in this era① 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.
② Once per turn, you can either:
● Target 1 Machine you control; equip this card to that target, OR:
● Unequip and Special Summon this card.
③ If the equipped monster would be destroyed, destroy this card instead.
④ A monster can only be equipped with 1 Union Monster at a time.
Rulings
When equipping to a monster:
- If the target of is not a Machine, or is flipped face-down or leaves the field, this card is destroyed.
While equipped to a monster:
- If the equipped monster is flipped face-down or leaves the field, this card is destroyed at the exact same time (by game mechanics).
- This card is treated as an Equip Spell (and not a monster).
When Summoning this equipped card:
- If there is no empty Monster Zone when this effect resolves, this card is sent to the GY.
- If the equipped monster is flipped face-down or leaves the field, this card is destroyed at the exact same time (by game mechanics).
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.