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    Monster Trove: Old Fears and Hungry Things

    Nidhoggr

    Gargantuan - Wild Vile (Reaver)
    HP
    241
    AC
    19
    DR
    5
    Attacks
    1
    Attack
    3d10+5
    Size
    Gargantuan
    Alignment
    Wild Vile (Reaver)
    Intelligence
    Exceptional (15-16)
    Magic Resistance
    Plant magic directed through a living root affects Nidhoggr normally and ignores its DR.
    Saves
    Quick 1 / Tough 8 / Mind 5

    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.

    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.