Slithers IV, the hydra's sacrifice

LE Large aberration, undead (incorporeal)
Str
–
Dex
21
Con
–
Int
16
Wis
15
Cha
21 17, 4
Race
Dark Naga
Ghost
CR
11
Deity
Lamashtu
Senses
Darkvision 60ft.
Speed
Fly 30 ft. (perfect)
Languages
Common, Infernal, Necril
Special
You don't breathe, eat, or sleep.
naga
Alertness
Combat Casting
Dodge
Eschew Materials
Lightning Reflexes
Stealthy
Your Spell DC is 10 + the spell level + your Charisma modifier.
To make a concentration check, add your caster level + your Charisma modifier.
To affect foes with spell resistance, make a caster level check ≥SR.

Caster Level 7th

Constant

detect thoughts (Su, CL 9th, Will DC 20 negates)

Level 0

Level 1 8/day

Level 2 7/day

Level 3 5/day

Corrupting Touch (Su)

+11 vs TouchAC 7 bab, 5 dex, -1 size
10d6 10 naga
Fort DC 20 halves. Affected by immunity to aging

Sting 20×2 P

+11 vs AC 7 bab, 5 dex, -1 size
2d4 + poison 0 str

Sting's Poison

Fort DC 19, freq 1 round, sleep 2d4 minutes, cure 1 save.

Malevolence

As a safe standard action, try to possess an adjacent creature, as magic jar (CL 10th, Will DC 20 negates).
Creatures that save are immune for 24h.

Rejuvenation (Su)

A destroyed ghost comes back to unlife in 2d4 days, unless the event creating it is resolved.

Loot: a large stinger made of bone, aura of Overwhelming Necromancy.
Loot: two very pure diamonds fall from the eyes. Worth 250gp each.

Slithers knows that he is only a projection of his soul, through the Altar of Lamashtu higher on the hills.
He can fight to the death with no consequences, except that the Mother of Monster will have him cut his stinger again through great pain.
However, he cannot let the enemy figure out that he comes from the Altar of Lamashtu. They could trace his real body from there.
He will mislead them, lie to them, bluff them to lure them away.

He is also attacking 4 other places at the same time, including a secluded dark witch's tower. He could try to convince everybody that the source of the undead is there.

Lamashtu grants him great powers to expand the monster realms beyond the mountains. He's attacking all strongholds that prevent monsters from expanding.
His real body is a hydra, and every head is ghost-sent on their particular mission.

Eyes
Black
Scales
Silvery Black
Height
12' 7''