A very helpful walrus points TBD in the right direction, but will the undead be their undoing?

The fortress TBD explores
Has ice on the walls and the floors.
Krixis keeps things chillin’
While Aronan’s all for killin’
And Doc takes care of the doors.

Character creation tool: https://dndbeyond.com
Aronan: https://ddb.ac/characters/24765577/90TtAK
Krixis Rubicon: https://www.dndbeyond.com/characters/32635458
Baern Fireforge “Doc”: https://www.dndbeyond.com/characters/37482366
Twitter: https://twitter.com/2nerds1quest
Website: https://SchaffenCreative.com/2-nerds-1-quest/