Keith Giffen really pulled out all the cosmic stops to draw Challengers of the Unknown in 1977 and 1978. Also featuring Deadman and Swamp Thing. Here are some especially awesome pages to blast your brain!
This issue packs immortal demons from space, muck monsters from the bog, gorgeous gals in distress, sonic ray guns with sweet visual effects – you can’t ask for much more entertainment factor! Giffen’s entire run is a blast, and the art gets even weirder as it goes along.
– From Challengers of the Unknown.
The entire story runs from #81-87, the final issue.