Complex sentence: This transformation means Hwen cannot come into physical contact with other people, putting incredible strain on Hwen and Carmen's marriage as they attempt to return to normal life, until Hwen receives training to harness his powers and can become solid for short periods of time.
Split into simpler sentences: This transformation means Hwen cannot come into physical contact with other people. Then Hwen receives training to harness his powers and can become solid for short periods of time.