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Aeon, Bythos

A shimmering, colorless mass congeals to form a four-armed humanoid shape with an eye-like pattern in its torso.

Bythos CR 16

XP 76,800
N Large outsider (aeon, extraplanar)
Init +8; Senses blindsense 60 ft., darkvision 90 ft., low-light vision; Perception +30


AC 31, touch 18, flat-footed 26 (+4 deflection, +4 Dex, +1 dodge, +13 natural, –1 size)
hp 207 (18d10+108); fast healing 10
Fort +18, Ref +12, Will +20
Immune cold, critical hits, poison; Resist electricity 10, fire 10; SR 27


Speed fly 40 ft. (good)
Melee 4 slams +23 (1d6+6 plus 1d6 cold and aging strike)
Space 10 ft.; Reach 10 ft.
Special Attacks confusion gaze, temporal strike
Spell-Like Abilities (CL 18th; concentration +23)

At will--augury, greater teleport, slow (DC 18)
3/day--dimensional anchor, haste, plane shift (DC 20)
1/day--dimensional lock, moment of prescience, temporal stasis (DC 23)


Str 22, Dex 19, Con 21, Int 24, Wis 28, Cha 21
Base Atk +18; CMB +25; CMD 44 (can’t be tripped)
Feats Combat Casting, Combat Reflexes, Dodge, Great Fortitude, Hover, Improved Initiative, Lightning Reflexes, Mobility, Toughness
Skills Bluff +26, Fly +6, Heal +30, Intimidate +26, Knowledge (arcana, nature, religion) +33, Knowledge (history, planes) +36, Perception +30, Sense Motive +30, Spellcraft +28, Stealth +21, Use Magic Device +23
Languages envisaging
SQ extension of all, void form


Aging Strike (Su)

If a bythos strikes a living target with two slam attacks in a single round, the bythos ages the creature, causing it to advance to the next age category if it fails a DC 24 Fortitude save. The victim gains all of the penalties from this aging and none of the bonuses. A venerable victim targeted by this ability dies if it fails a DC 24 Fortitude save. This process is reversible with greater restoration, limited wish, miracle, or wish. The save DC is Constitution-based.

Confusion Gaze (Su)

Confusion for 1d4 rounds, 30 feet, Fortitude DC 24 negates. This is a gaze effect. The save DC is Charisma-based.

Temporal Strike (Su)

As a standard action, a bythos can touch a creature or object to displace it from time. If the target fails a DC 24 Fortitude save, it disappears from the present moment and reappears in the same location 1d4 rounds later as if no time had passed. If an object occupies that space, the creature appears in the closest available space to its original location—this displacement does not cause the creature any additional harm. The save DC is Charisma-based.