Number 81: Superdreadnought Rail Cannon Super Dora (TDIL-EN091) - The Dark Illusion Unlimited

2 Level 10 monsters
Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, then target 1 face-up monster on the field; that target is unaffected by card effects, except for its own effects, until the end of this turn.