Illusion Magic • Nightmare Attack

Phantasmal Killer

Phantasmal Killer weaponises a creature’s deepest fear. Its mechanics changed dramatically between 3.5e/Pathfinder and fifth edition, so each ruleset must be kept separate.

Phantasmal Killer at a Glance

5.5e / 2024	4th-level Illusion — Bard, Wizard
5e / 2014	4th-level Illusion — Wizard
Pathfinder 1e	4th-level Witch and several arcane/psychic classes
D&D 3.5e	Sorcerer/Wizard 4
Witch archive	Listed at 5th level in the preserved legacy Witch list

Spell Rules by Edition

5.5e / 20245e / 2014Pathfinder 1eD&D 3.5e

5.5e / 2024

Level/School	4th-level Illusion (Bard, Wizard)
Casting Time	Action
Range	120 feet
Components	V, S
Duration	Concentration, up to 1 minute
Save	Wisdom

The target makes a Wisdom save. On a failed save it takes 4d10 Psychic damage and has Disadvantage on ability checks and attack rolls for the duration. On a successful initial save it takes half damage and the spell ends.

At the end of each of its turns, the target repeats the Wisdom save. On a failure it takes the Psychic damage again; on a success the spell ends. Damage increases by 1d10 per slot level above 4th.

5e / 2014

Level/School	4th-level Illusion
Casting Time	1 action
Range	120 feet
Components	V, S
Duration	Concentration, up to 1 minute
Save	Wisdom

On a failed initial Wisdom save, the target becomes frightened for the duration. At the end of each turn it makes another Wisdom save; a failed save deals 4d10 Psychic damage, while a successful save ends the spell.

Damage increases by 1d10 for each slot level above 4th.

Pathfinder 1e

School	Illusion (Phantasm) [fear, mind-affecting]
Level	Witch 4, Sorcerer/Wizard 4; additional arcane and psychic class lists may grant access
Components	V, S
Casting Time	1 standard action
Range	Medium (100 ft. + 10 ft./level)
Target	One living creature
Duration	Instantaneous
Saving Throw	Will disbelief, then Fortitude partial (see text)
Spell Resistance	Yes

The subject first attempts a Will save to disbelieve its personal nightmare. If it fails, the phantasm strikes: a failed Fortitude save kills it from fear, while a successful Fortitude save leaves it alive but deals 3d6 damage. The subject sees the terrifying figure; the caster perceives only a vague shape.

Counterplay: appropriate immunity to fear or mind-affecting effects blocks this spell, as does successful spell resistance or disbelief. A subject that disbelieves and has telepathy or a helm of telepathy can potentially turn the phantasm on its caster under Pathfinder’s specific rule.

Source: Archives of Nethys — Phantasmal Killer.

D&D 3.5e

School	Illusion (Phantasm) [Fear, Mind-Affecting]
Level	Sorcerer/Wizard 4; the Witch archive separately lists this spell at Witch 5
Components	V, S
Casting Time	1 standard action
Range	Medium (100 ft. + 10 ft./level)
Target	One living creature
Duration	Instantaneous
Saving Throw	Will disbelief (if interacted with), then Fortitude partial
Spell Resistance	Yes

The target sees its deepest nightmare and makes a Will save to disbelieve. If it fails, a Fortitude save determines whether the nightmare kills it; a successful Fortitude save still causes 3d6 damage. A target that disbelieves while wearing a helm of telepathy can turn the phantasm against the caster under the original rule.

Source: D&D 3.5 SRD — Phantasmal Killer.

What Changed?

2024: no instant-death effect; repeated Psychic damage and Disadvantage replace the old fear-kill sequence.
2014: the spell frightens the target and deals repeat Psychic damage.
PF1e/3.5e: failure of two different saves can kill the target outright.

Using Phantasmal Killer in Play

The fifth-edition spell rewards concentration and repeated pressure. The older versions are save-or-die effects, making protection from fear, mind-affecting effects and spell resistance much more important.

Counterplay and Rulings

2024: successful initial Wisdom saving throw halves the first damage and ends the spell; later successful saves end it. Breaking concentration also ends its ongoing effect.
2014: an initial successful Wisdom save prevents the frightened effect; a successful later Wisdom save ends the spell.
Legacy d20: mind-affecting or fear immunity, spell resistance and the two saving throws are separate defences; do not import 2024 damage into Pathfinder or 3.5e.
Counterspell and Dispel Magic: countering a cast may prevent the phantasm; a completed instantaneous legacy spell has no ongoing duration to dispel. The ongoing fifth-edition spell can be ended according to that edition’s rules.

Mythical Context

Greek dream stories include Morpheus, a figure able to assume a human likeness within a dream. A phantasmal attack turns this unsettling power against a waking victim, making what the target believes it sees more important than the shapes perceived by everyone else. See the Metropolitan Museum’s print of Morpheus and Alcyone.

Historical Context

Protective jewellery from Greco-Roman antiquity reflects fear of harmful supernatural looks and influences. A Roman carnelian ring stone with hybrid faces was worn in hopes of averting the evil eye. It documents ancient protective belief, not fatal illusion magic. See the Metropolitan Museum’s Roman protective ring stone.