This feels like a dumb question because I'm baffled by the answer I was given at a tournament last night, but:

If you've successfully mind controlled an opposing figure and then, while attacking with that figure, roll a critical miss, does the controlled figure take the crit miss damage?

With my luck I managed to mind control chase Thanos last night repeatedly but then could only roll critical misses with him, but was denied all that damage. I don't see any reason why that would be the case, but maybe I'm just missing something.

If you mind control an opposing character and when you attack with it roll a critical miss, that character (the one who was mind controlled and made an attack that critically missed) will take an unavoidable damage immediately after mind control resolves. While hitting with that character might have been nice, a critical miss is a great consolation, particularly when the mind controlled character has Mystics.

Whoever said you couldn't deal the unavoidable damage is the very definition of a toxic player.

My horrible runs of critical misses are one of the reasons that Mind Control is so much fun for me.

My fellow players have a good chuckle about my dice luck ( Incredibly hot or absolutely sub-zero ) until I Mind Control their character and then my bad dice luck becomes their bad dice luck.

I'd be curious to hear what their reasoning was, because they were very wrong about a relatively simple concept. The character made an attack, and rolled 1-1, so it takes the damage. There's not really any room to "misinterpret" this.

I don't think it was done with malice or anything. I think the group must have had a big debate about it when I wasn't there one night and somehow decided it incorrectly. Our regular judge was out last night, so I'm not sure why they decided it that way.

Maybe confusion over the past rules when Incap and Mind Control were no-damage dealing powers and so crit misses (and hits) did "no damage"?

Even then, the MC'd character would take damage if it crit missed on it's attack.

What if you roll a critical miss during a mind control roll?

Mind Control is an attack, so you would miss and take one unavoidable damage immediately after resolutions.

The technical term is "brain sprain."

Not sure what you mean here. Mystics would not trigger off of critical miss damage and hurt yourself during Mind Control. The critical miss damage is after resolutions and not considered to be coming from an opposing character's attack or any attack at all.

I mean that it is a way to damage their mystics character without getting damaged by mystics. The op said he mc'd Thanos who has mystics. So he dealt Thanos damage without having to take mystics. That's pretty nice.

Yep....A mind controlled character cannot hit their mystic teammate and deal themselves damage.

Uhm, yes they do. Any character that attacks and deals damage to a Mystics character will take 1 penetrating damage after resolutions.