Draugr

The restless dead of a warrior buried with treasure, swollen with grave-cold malice and the strength to match. A draugr guards its barrow and hoard with brutal jealousy, growing to giant size to crush thieves and crashing back down upon them. It forgives neither the theft of its gold nor the breaking of its rest.

Draugr Blade: slashing, melee 5 ft, +2 to hit, 2d6+4 slashing. Crushing Slam: bludgeoning, melee 5 ft, 1d8+4 bludgeoning. Barrow Swell: the draugr swells to giant size; its next slam deals 2d10+4 and knocks the target prone on a failed Dex Quick save, cooldown 3 rounds.

Undead Nature: immune to poison, charm, and sleep. Hoard-Bound: while within its barrow it has +2 to saves and recovers hit points each round. Senses: Night Vision (60 ft), Living Sense (feels the living, 60 ft).