Nicol bolas’ invasion has begun. Multiple worlds are feeling the incursion thanks to the permanent portals on ixalan and kaldheim.  Trostani was dead but szithis revived her and made them abzan.  Bruna is frozen in time and her interaction with a paradox duplicate from innistrad is what caused reality to fracture on Ravnica, giving nicol bolas an opportunity to fracture it further.  The Parhelion II is slowly crashing to the ground. Vannifar revealed a teleporter she and Zegana had been working on to take out the boros from the inside should the Warmind initiative become a threat.  She teleported you aboard, but everyone was split up in random locations across the ship. They would have to fight their way clear of the wreckage and reunite.