Number 66: Master Key Beetle

Level 4 DARK/Insect Xyz Effect
2500 ATK / 800 DEF

2 Level 4 DARK monsters
Once per turn: You can detach 1 Xyz Material from this card, then target 1 card you control, except this card; while this card is face-up on the field, that card(s) cannot be destroyed by card effects. If this face-up card on the field would be destroyed, you can send one of its targets to the Graveyard instead.

Rulings – Yugipedia

Printings:

Judgment of the Light: JOTL-EN054 (Super Rare) - 2013-08-08
2014 Mega-Tin Mega Pack: MP14-EN099 (Super Rare) - 2014-08-28
Wing Raiders: WIRA-EN045 (Common) - 2016-02-11

Prices:

Cardmarket: 0.21 €
TCGplayer: $ 0.18