Holocron

Hex

Force power · Level 1 · Dark
power-typeForcelevel1alignmentDarkconcentrationtrue
Tweaked from 5eYou already know this as 5e Bestow Curse — It's the SRD curse closest to Hex — pick an ability for disadvantage on its checks and add bonus necrotic damage when you hit, though Bestow Curse is a higher-level touch spell with a save and bundles its options rather than always granting the damage.
Curse one creature to take +1d6 necrotic damage on each hit and suffer disadvantage on one ability of your choice.
DebuffDamage
●●●breadth · any combat, any level
TargetingSingle
Use whenyou plan to attack the same target repeatedly this fight
ScalingCasting at 3rd–4th slot extends duration to 8 hours; 5th+ extends to 24 hours.
!Dark-side power — repeated casting carries a corruption cost; requires concentration for its full duration.
necroticpsychicmind-affecting
Pairs witha high-attack-rate build · Affliction · Eldritch Knight-style gish
PlaystyleControllerStriker

You curse an opponent within range. Until the power ends, you deal an extra 1d6 necrotic damage to the target whenever you hit it with an attack. Also, choose one ability when you cast the power. The target has disadvantage on ability checks made with the chosen ability.

If the target drops to 0 hit points before this power ends, you can use a bonus action on a subsequent turn of yours to curse a new creature.

Force Potency. When you cast this power using a force slot of 3rd or 4th level, you can maintain your concentration on the power for up to 8 hours. When you use a force slot of 5th level or higher, you can maintain your concentration on the power for up to 24 hours.

Codex
Casting Period
1 bonus action
Range
90 feet
Duration
up to 1 hour
Concentration
Yes