Complex sentence: Rage left after a brief scuffle, but ended up assisting the Avengers in their next mission against L.D.50; alongside the Avengers, he battled other-dimensional alien prisoners.
Split into simpler sentences: Rage left after a brief scuffle, but ended up assisting the Avengers in their next mission against L.D.50. Alongside the Avengers, he battled other-dimensional alien prisoners.