Returning home triumphant following their exploits in the Vault of Dragons, the Champions discover their enemies have been there before them - the Xanathar has kidnapped Ulkoria Stonemarrow and taken her to Undermountain.
Their ally in danger, the Champions meet with their old friend Durnan and descend into the Yawning Portal.
Note: you will need to have completed the previous two Dragon Heist Adventures, Vault of Dragons and Champions of Waterdeep, in order to access these new Adventures.

Once More Into The Breach
An ally has been taken, and in order to save them the Champions will need to descend once more into Undermountain.- Twice More Into The Breach — Each boss needs to be defeated twice to advance. Only Champions with WIS of 12 or lower can be used.
Reach Area 275.
Wyllowwood
The Champions need to convince the Wyllow of Wyllowwood to help them to find their ally, but the Githyanki have other plans.- Displaced Anger — Wyllow's Displacer Beast companion Crissann arrives at every boss level, intent on stopping us from destroying Wyllowwood. The Displacer Beast is tough to hit. When it first spawns, each attack has a 1% chance of hitting. With each attack, your team gets better at finding the Displacer Beast's true location.
Reach Area 275.