Gas Mimicry – The being has a body composed of gas.
In Adventure Comics -Legion of Super-Heroes #324, Gas Girl (DC) turns into gas and knocks out Star Boy.
Mist (DC) can turn into a living vapor (DC Who’s Who #15).
Vapor (Marvel) has this power.
Ozone (Impact) is slowly becoming the gas ozone (Who’s Who in the Impact Universe #3).
Crimson Death – TSR 2140A Monstrous Manual
Diablo (Marvel) – Tales of Suspense V1 #9
The Galaxy Trio includes Vaporman (Hanna Barbera).
Vampiric Mist – TSR 2140A Monstrous Manual
Gas Mephits – TSR 2140A Monstrous Manual
Yochlol – TSR 2016 Monster Manual II
Next Gastropod Mimicry