Number 33: Chronomaly Machu Mech (REDU-EN043) - Return of the Duelist Unlimited

2 Level 5 monsters // Once per turn: You can detach 1 Xyz Material from this card to target 1 face-up monster your opponent controls; inflict damage to your opponent equal to the difference between its original ATK and current ATK, and if you do, this card gains ATK equal to the damage inflicted.