Complex sentence: With WotC working independently of outside parties, the set was ready, complete with final text and card art, ahead of schedule, though no card illustrations were credited to the mysterious artist formerly known as Marvel staff.
Split into simpler sentences: With WotC working independently of outside parties, the set was ready, complete with final text and card art, ahead of schedule. Interestingly, no card illustrations were credited to the mysterious artist formerly known as Marvel Staff.