Monster Trove: Old Fears and Hungry Things
Nidhoggr
Gargantuan
About
Nidhoggr is the dragon gnawing at the root of the world-tree, feeding on decay, oath-breakers, and the dead. Its work is patient enough to resemble geology until a root shudders across realms. Conquest is unnecessary to Nidhoggr; patient feeding upon what holds worlds together achieves the same ending. Every battle therefore has a second objective: protecting the root beneath it.
Stats
HP
241
AC
19
DR
5
Attacks
1
Attack:
3d10+5
Save Rolls
Quick
1
Tough
8
Mind
5
Default Save TN (based on HP): 5
Traits
Alignment:
Wild Vile (Reaver)
Intelligence:
Exceptional (15-16)
Magic Resistance:
Plant magic directed through a living root affects Nidhoggr normally and ignores its DR.
Special Attack
Root-Gnawer's Breath: creatures in a 90 ft cone make a Tough save. A failure deals 6d8 necrotic damage and reduces DR by 1 for the encounter.
Special Defense
Protect the Root: every 25 damage dealt to an exposed world-root heals Nidhoggr for the same amount. Repairing or shielding the root removes 1 DR from the dragon each round.