Number 66: Master Key Beetle (MP14-EN099) - (Super Rare) - 2014 Mega-Tins Mega Pack Unlimited

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 would be destroyed, you can send one of its targets to the Graveyard instead.