Originally posted by TricksterPriestColossus had his power drained by the tentacles recently.
I don't believe gas masks work. One of the few times it failed was against Chamber, but his body at the time was sustained by pure PSI energy. No lifeforce to drain.Colossus was immune in metal form, but whether that's due to not breathing or his body being metallic is impossible to say. Though, it's worth noting that Colossus could be restrained via the tendrils and could not break them.