le medium mummy undead 

Perception +10; darkvision

Languages Necril, plus any one language they knew while alive

Skills Athletics +7, Stealth +9

Str +3 Dex +1 Con -2 Int -2 Wis +4 Cha +2

AC  17 (5 when crumbling);); Fort +6, Ref +7, Will +10

HP 40, negative healing; Immunities death effects, disease, paralyzed, poison, unconscious; Weaknesses fire 5

Crumbling Form A decrepit mummy is barely cohesive. Once a decrepit mummy is reduced to fewer than half their Hit Points, or immediately upon being damaged by a critical hit, they start falling apart, reducing their Armor Class to 15.

Speed 20 feet

Melee [>] fist +11, Damage 1d8+3 bludgeoning plus lesser mummy rot

Lesser Mummy Rot (disease, divine, necromancy, negative) The damage from this disease can't be healed while a creature still has the disease. A creature killed by lesser mummy rot turns to dust and can't be resurrected except by a 7th-level resurrect ritual or similar magic;

Saving Throw DC 16 Fortitude; Stage 1 carrier with no ill effect (1 minute); Stage 2 2d6 negative damage and stupefied 1 (1 day)

Book of the Dead, page 130. Expanded in LOIL.