The evil Brand Corporation turns the assassin Tarantula into an actual human tarantula hybrid at the same time that Will O’ The Wisp attacks their Corporate headquarters because he’s mad at how they treated and transformed him into a light being.
There’s a lot of three-way fighting between the characters and in the end Tarantula hates how he’s been monster-ized so he kills himself.
This is actually the rare example of a suicide in comics that is successful.
As usual, the Stern/Romita Jr. team is unbeatable. My only critique of this story is that I was a big fan of Tarantula and hated to see him go.