Complex sentence: He fought Black Tom Cassidy in the Phoenix Saga and alongside the X-Men in "Proteus", his last appearance was in "The Phalanx Covenant" part 2.
Split into simpler sentences: He fought Black Tom Cassidy in the Phoenix Saga and alongside the X-Men in the episode "Proteus". His last appearance was in the episode "The Phalanx Covenant" part 2.