Conversation so far:
When was Mojo (comics) first seen?
Mojo first appeared in Longshot #3
What happened to Mojo in Longshot?
Longshot battles Spiral, and defeats Mojo with the aid of Ricochet Rita, Quark, and Doctor Strange, who then send Mojo and his minions back to the Mojoverse.
When was Mojo next seen?
The New Mutants Annual #2.
Did Mojo appear often after that in comic books?
Yes

Question: What did he do in the comic books
Self-contained rewrite: What did Mojo do in the comic books?