I have the stage set for this big moment. The players enter a room in which an artifact has been used to open a portal to the plane of Limbo. The spirit of an ancient dragon lives within the artifact and has been using those that opened the portal, and now that dragon is pulling all chaos from Limbo in order to give himself the perfect resting place for eternity. This will create a gray waist of Limbo, and could destroy the material plane with the excessive amounts of chaos. Enter the players, seeing a swirling portal, a trapped Githzerai, dark tendrils chaos holding the Gith in place, and Slaadi on the other side slowly dying from all these events.
And it is here that the problem comes into play. How can I make this an epic and interesting encounter without there being a combat to solve the problem? There should be a way to resolve this without a battle, but I can't think of one.
The party consists of an Oracle, Wizard, Bard, Ninja, and Alchemist. They have all the elements they need to resolve this, but the problem is that I am just not sure how to present it to them in a way that they can resolve it without swords drawn. Any ideas?