Aboleth Mage* (CR 17)

Huge Aberration (Aquatic)
Alignment: Usually lawful evil
Initiative: +7 (+3 Dex, Improved Initiative); Senses: darkvision 60 ft., Listen +15, and Spot +17


AC: 18 (–2 size, +3 Dex, +7 natural), touch 11, flat-footed 15
Hit Dice: 8d8+56 plus 10d4+70 (177 hp)
Fort +15, Ref +10, Will +15
Speed: 10 ft., swim 60 ft.
Space: 15 ft./10 ft.
Base Attack +11; Grapple +28
Attack: Tentacle +18 melee
Full Attack: 4 tentacles +18 melee
Damage: Tentacle 1d6+9 plus slime
Special Attacks/Actions: Enslave, psionics, slime, spells
Abilities: Str 28, Dex 16, Con 24, Int 20, Wis 16, Cha 14
Special Qualities: Aquatic subtype, mucus cloud, summon familiar
Feats: Combat Casting, Empower Spell, Eschew Materials, Great Fortitude, Improved Initiative, Lightning Reflexes, Scribe Scroll, Spell Focus (illusion), Spell Focus (enchantment), Spell Penetration
Skills: Bluff +13, Concentration +25, Decipher Script +15, Diplomacy +6, Disguise +2 (+4 acting), Intimidate +4, Knowledge (arcana) +15, Knowledge (dungeoneering) +25, Knowledge (history) +15, Knowledge (the planes) +15, Listen +15, Search +10, Sense Motive +15, Spellcraft +20, Spot +17, Survival +3 (+5 following tracks, Swim +8, and underground), and on other planes
Advancement: By character class
Climate/Terrain: Any underground
Organization: Solitary
Treasure: Double standard

Source: Web

Combat

Enslave (Su): Three times per day, an aboleth can attempt to enslave any one living creature within 30 feet. The target must succeed on a DC 16 Will save or be affected as though by a dominate person spell (caster level 16th). An enslaved creature obeys the aboleth's telepathic commands until freed by remove curse, and can attempt a new Will save every 24 hours to break free. The control is also broken if the aboleth dies or travels more than 1 mile from its slave. The save DC is Charisma-based.

Psionics (Sp): At will - Hypnotic pattern (DC 14), illusory wall (DC 16), mirage arcana (DC 17), persistent image (DC 17), programmed image (DC 18), project image (DC 19), veil (DC 18). Effective caster level 16th.

The aboleth mage uses a number of spells, such as displacement, greater invisibility, and wall of force, to protect itself while seizing control of its foes with spells and innate abilities.

Typical Wizard Spells Prepared (4/6/5/4/4/3; save DC 15 + spell level): 0 - daze, detect magic (2), resistance; 1st - alarm, charm person, color spray, mage armor, magic missile (2); 2nd - blur, bull's strength, darkness, fox's cunning, see invisibility; 3rd - dispel magic, displacement, fly, lightning bolt; 4th - greater invisibility, phantasmal killer, scrying, stoneskin; 5th - hold monster, empowered lightning bolt, wall of force.

Slime (Ex): A blow from an aboleth's tentacle can cause a terrible affliction. A creature hit by a tentacle must succeed on a DC 21 Fortitude save or begin to transform over the next 1d4+1 minutes, the skin gradually becoming a clear, slimy membrane. An afflicted creature must remain moistened with cool, fresh water or take 1d12 points of damage every 10 minutes. The slime reduces the creature's natural armor bonus by 1 (but never to less than 0). The save DC is Constitution-based.

A remove disease spell cast before the transformation is complete will restore an afflicted creature to normal. Afterward, however, only a heal or mass heal spell can reverse the affliction.

Mucus Cloud (Ex): An aboleth underwater surrounds itself with a viscous cloud of mucus roughly 1 foot thick. Any creature coming into contact with and inhaling this substance must succeed on a DC 21 Fortitude save or lose the ability to breathe air for the next 3 hours. An affected creature suffocates in 2d6 minutes if removed from the water. Renewed contact with the mucus cloud and failing another Fortitude save continues the effect for another 3 hours. The save DC is Constitution-based.

Skills: An aboleth has a +8 racial bonus on any Swim check to perform some special action or avoid a hazard. It can always choose to take 10 on a Swim check, even if distracted or endangered. It can use the run action while swimming, provided it swims in a straight line.

Aquatic Subtype

Creatures with the aquatic subtype always have swim speeds and thus can move in water without making Swim checks. An aquatic creature can breathe underwater. It cannot also breathe air unless it has the amphibious special quality.

This is a sample creature derived from a Template.