n large mindless ooze 

Perception +8; motion sense 60 feet, no vision

Skills Athletics +13, Stealth +4 (+12 if hiding inside a dead body)

Str +5 Dex -4 Con +5 Int -5 Wis +0 Cha -5

Infuse Corpse [>] A blood ooze can seep into a corpse's wounds, displacing its natural blood. It can burst out of the corpse as a free action.

AC  12; Fort +15, Ref +6, Will +6

HP 90; Immunities mental, precision, critical hits, unconscious, visual

Clot [R] Trigger The blood ooze is damaged by piercing or slashing attack. Effect The blood ooze forms a clot around the wound, reducing the damage taken by 5 (to a minimum of 0).

Blood Pool Whenever a creature adjacent to a blood ooze takes bleed damage, the blood ooze regains an amount of Hit Points equal to the damage dealt.

Speed 10 feet, climb 10 feet

Melee [>] pseudopod +15 (reach 10 feet), Damage 1d12+8 bludgeoning plus 1d6 persistent bleed

Siphon Vitality [>>] The blood ooze draws forth blood from nearby creatures, causing their flesh to break open and blood to spill out which replenishes the blood ooze. Each living creature within 15 feet takes 3d6 slashing damage (DC 21 basic Fortitude save). The blood ooze regains an amount of Hit Points equal to half the damage Siphon Vitality dealt to the single creature that took the most damage.

The Fall of Plaguestone, page 63.