Holocron

Hysteria

Force power · Level 4 · Dark
power-typeForcelevel4alignmentDarkconcentrationtrue

⟜ Requires Hallucination

Tweaked from 5eYou already know this as 5e Phantasmal Killer — It's Phantasmal Killer almost word-for-word, except the recurring save comes at the end of the target's turn instead of the start, and it does nothing to droids or constructs.
Frighten one creature; each turn it takes 4d10 psychic damage or the power ends on a successful Wisdom save.
DebuffDamage
●●breadth · no effect on droids
TargetingSingle
Use whenyou want sustained pressure on a priority target with no concentration worry
ScalingDamage increases by 1d10 per slot level above 4th.
!Dark-side power — repeated casting carries a corruption cost; requires concentration and the Hallucination prerequisite; no effect on droids or constructs.
fearpsychicmind-affecting
Pairs withHallucination · high Wisdom save DC · Dark-side Force caster
PlaystyleControllerStriker

You tap into the nightmares of a creature you can see within range and create an illusory manifestation of its deepest fears, visible only to that creature. The target must succeed on a Wisdom saving throw or become frightened for the duration. At the end of each of the target's turns before the power ends, the target must succeed on a Wisdom saving throw or take 4d10 psychic damage. On a successful save, the power ends. This power has no effect on droids or constructs.

Force Potency. When you cast this power using a force power slot of 5th level or higher, the damage increases by 1d10 for each slot level above 4th.

Codex
Casting Period
1 action
Range
120 feet
Duration
up to 1 minute
Concentration
Yes