Planeswalkers, powerful mages from many disparate realities, must unite against the elder dragon Nicol Bolas, who has claimed dominion over Ravnica and is perilously close to completing the spell that will grant him godhood. Now, as dozens of Planeswalkers fight alongside the Gatewatch—led by Chandra Nalaar, Jace Beleren, and Gideon Jura—against Bolas and his relentless army of Eternals, nothing less than the fate of the multiverse is at stake.