Mi-go do not require air or heat to survive, only sunlight (and very little of that). They can enter a sporulated form capable of surviving travel through the void and returning to consciousness when conditions are right.

The mi-go are a highly advanced race, and may carry items of powerful technology. Mi-go technology can be represented using the same rules as magic items, but their functions are very difficult to determine: identify is useless, but an hour of study and a successful DC 19 Arcana check can reveal the purpose and proper functioning of a mi-go item.

The mi-go does an extra 7 (2d6) damage when it hits a target with a claw attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the mi-go that isn’t incapacitated and the mi-go doesn’t have disadvantage on the attack roll.