D&D 5E - The Rise of Tiamat

Vultures. Flocks of vultures might be seen circling
at a distance, or could harass the characters if they
mistake them for lost travelers on their last legs.
R u in e d Settlement. Crumbling stones and dry wells
are all that remain of the many lost settlements of the
Serpent Hills.
Lizardfolk. Lizardfolk regularly hunt and gather food
for their yuan-ti masters, grabbing humanoid settlers
along the fringes of the hills when they can.
T o m b o f D id e r i u s
The Tomb of Diderius and its magic pool are hidden
within a complex of chambers carved into a towering
cliff. Originally part of the manse the wizard Diderius
built around the mystical divination pool, the complex
was converted to a crypt only after his death. The
crypt looks down over the ruins of the town that grew
up around the magic pool to cater to those who came
seeking Diderius’s wisdom.
The town once nestled into a canyon between two
bluffs, but only a few ruined stone structures and the
slab foundations of administrative and temple buildings
now remain. Cave entrances dot the bluffs, marking
former residences and simple tombs. None of the ruins
hold anything of value or interest, but the caves offer
safe places for the party to rest.
Knowledge of the settlement that once stood here
has been lost to all except Ilda, a ghostly librarian in
area 9 of the crypt, who has answers to many forgotten
questions. As well, though few seek the pool these days,
a small yuan-ti colony known as Ss’tck’al has arisen
behind the crypt. The yuan-ti use humanoid sacrifices to
power the divination pool’s magic, learning dark secrets
that fuel their insidious plots.
G e n e r a l F e a t u r e s
Unless otherwise specified, the floor and walls of the
dungeon are sandstone blocks and flagstones. The walls
are cool to the touch and the air is cold.
Ceilings. 10 feet high unless otherwise noted.
Light. None, unless outdoors or otherwise specified.
Regional Effects. When Diderius died, those who
honored him in life transformed him into a special
mummy lord whose magic pervades his tomb. Since
Diderius is neutral rather than evil, the area lacks dark
magic common to other mummy-lord tombs. A few
chambers of the tomb have the appearance of opulent
and well-kept rooms suitable for a noble archmage. This
effect is an illusion, however, failing to cover the rank
scent of dust and decay. Diderius’s magic also guides
those who show proper respect.