After a bit of a rest and some downtime, Bahamut meets you outside the gates to the Former City of Brass….
Hail, heroes, Bahamut intones. Though the cost was high, together we’ve dealt the Dragon Queen a grievous blow. Yet she lurks in Tytherion, and Tiamat will certainly rise again. Unless . . .Unless you can perform one final deed for me, for our army, and indeed, for all those who reject evil.
My draconic children favor elegant turns of phrase, but I’ll be blunt: I want you to kill Tiamat. Not her aspect, not her avatar, but the deity herself. Too long has her evil spread through the universe. Too long have she and I fought each other to a standstill. I believe I can get you to the vicinity of her lair. And there is such power within you . . . If anyone can defeat Tiamat in lethal battle, it is you. After a pause, Bahamut continues. As you know, I’m acutely aware of what it takes to kill a god. Among those who answered our call here in the City of Brass, no one matches your power. Look at the army you see before you. Other than you, no one here would be more than a momentary annoyance to Tiamat. Only a small group can reach Tiamat at this crucial moment. Her forces are in disarray, fleeing the Dragon Queen’s wrath and fighting one another. She has lost control of most of her followers. But look at my army. It’s in no shape to close ranks and march on Tytherion, either. It would take a miracle for us to recover, reorganize, and reequip for another battle. Miracles are what I do, but even if you assume that miracle, then you have a shining army marching on Tiamat’s lair. And when we march, Tiamat’s dispersed, distracted forces will have a common foe to unite against.
You see where I’m leading this?
I ask you to do what my army cannot—what I myself cannot. Meet my agent in Tytherion, travel to Tiamat’s Lair, and slay her utterly. Her stronghold is being looted by her own rapacious dragons, and you should have little difficulty assailing what would otherwise be an impregnable fortress. Carve your way through what remains of Tiamat’s guards however you must. Slay her on the spot—and let her know that the world will be better off for her demise.