Complex sentence: Later in the series, Cobweb put in motion a complicated plot to invade the Earth and disrupt Rick's relationship with Sleepwalker, which involved disguising his minions as members of Sleepwalker's race and framing his archenemy as their leader.
Split into simpler sentences: Later in the series, Cobweb put in motion a complicated plot to invade the Earth and disrupt Rick's relationship with Sleepwalker. This involves disguising his minions as members of Sleepwalker's race and framing his archenemy as their leader.