I'm surprised this question hasn't been asked yet, it came up a few times at the pre-release Saturday, and maybe noone just thought much about it until now.
The card states "Once per turn you can place 1 A-counter on a monster on your opponent's side of the field." Alien Grey states to place a counter on a face-up monster, however. What makes this so important is Brainwashing Beam, which steals a monster with an A-Counter on it.
Given what we know about face-down monsters and targetting with continuous effects though, is Gangi'el's text correct, and you can indeed place a counter on a face-down monster, then possibly steal it with Brainwashing Beam, similar to what you could do wiht Change of Heart? Or would it only be able to place the counter on a face-up creature?
The card states "Once per turn you can place 1 A-counter on a monster on your opponent's side of the field." Alien Grey states to place a counter on a face-up monster, however. What makes this so important is Brainwashing Beam, which steals a monster with an A-Counter on it.
Given what we know about face-down monsters and targetting with continuous effects though, is Gangi'el's text correct, and you can indeed place a counter on a face-down monster, then possibly steal it with Brainwashing Beam, similar to what you could do wiht Change of Heart? Or would it only be able to place the counter on a face-up creature?