This is a Trigger Effect
This effect activates in the Damage Step, before a face-down monster is flipped face-up. (Therefore, this effect will not activate if a face-down “Neo-Spacian Grand Mole” is attacked. Also, if “Neo-Spacian Grand Mole” attacks a face-down Flip Effect Monster, you can return both monsters to the owners’ hands without activating the Flip Effect.)
This effect does not target.