Complex sentence: After a while, Err suggests they go visit Ignignokt's uncle Cliff, whose mind hasn't been right since the Lunar War, which may be an indication that Cliff has an intense case of PTSD.
Split into simpler sentences: After a while, Err suggests they go visit Ignignokt's uncle Cliff, whose mind hasn't been right since the Lunar War. An indication that Cliff has an intense case of PTSD.