10 feet. A creature entering the aura or starting its turn in the aura must succeed at a DC 26 Fortitude save or become Sickened 1 (plus Slowed 1 as long as it's sickened on a critical failure).
While within the aura, the creature takes a -2 circumstance penalty to saves against disease and to recover from the sickened condition. A creature that succeeds at its save is temporarily immune for 1 minute.
Effect: Stench
AC 27; Fort +19, Ref +14, Will +16
HP 135, void healing; Immunities bleed, death effects, disease, paralyzed, poison, unconscious
Void Healing
A creature with void healing draws health from void energy rather than vitality energy. It is damaged by vitality damage and is not healed by vitality healing effects. It does not take void damage, and it is healed by void effects that heal undead.
Speed 35 feet
Melee Jaws +20 (unarmed), Damage 2d10+9 piercing plus Ghast Ghast Fever plus Ghast Paralysis
Melee Claw +20 (agile, unarmed), Damage 2d8+9 slashing plus Ghast Paralysis plus Grab
Consume Flesh(manipulate)
Requirements The ghastly bear is adjacent to the corpse of a creature that died within the last hour.
Effect The ghastly bear devours a chunk of the corpse and regains 6d6 healing Hit Points.
It can regain Hit Points from any given corpse only once.
Ghast Fever(disease)
Saving Throw DC 26 Fortitude
Stage 1 carrier with no ill effect (1 day)
Stage 2 3d8 void damage and regains half as many Hit Points from all healing (1 day)
Stage 3 as stage 2 (1 day)
Stage 4 3d8 void damage and gains no benefit from healing (1 day)
Stage 5 as stage 4 (1 day)
Stage 6 dead, and rises as a Ghast the next midnight
Mauler
A ghastly bear gains a +4 circumstance bonus to damage rolls against creatures it has Grabbed.
Paralysis(incapacitation, occult)
Any living creature hit by a ghastly bear's attack must succeed at a DC 26 Fortitude save or become Paralyzed. It can attempt a new save at the end of each of its turns, and the DC cumulatively decreases by 1 on each such save.
Grab
Requirements The monster's last action was a successful Strike that lists Grab in its damage entry, or the monster has a creature Grabbed or Restrained
Effect If used after a Strike, the monster attempts to Grapple the creature using the body part it attacked with. This attempt neither applies nor counts toward the creature's multiple attack penalty.
The monster can instead use Grab and choose one creature it's grabbing or restraining with an appendage that has Grab to automatically extend that condition to the end of the monster's next turn.