Holocron

Death Field

Force power · Level 8 · Dark
power-typeForcelevel8alignmentDarkconcentration

⟜ Requires Siphon Life

Tweaked from 5eYou already know this as 5e Circle of Death — It's your Circle of Death — an area necrotic Con-save blast — bumped to a higher level with a vampiric twist that heals you when it drops an enemy.
Drain every creature in a 30-foot cube for 10d8 necrotic (Con save half); gain temp HP equal to half damage dealt when a hostile drops to 0.
DamageHealing
○○breadth · organic clustered enemies only
TargetingArea
Use whenenemies are clustered and you want to deal mass damage while self-sustaining
ScalingFlat — no higher-slot scaling.
!A dark-side power — repeated casting carries a corruption cost; requires Siphon Life as a prerequisite; no effect on droids or constructs.
necroticarea-denialhealing
Pairs withSiphon Life (prerequisite) · high force save DC builds · tank builds that want life-steal sustainability
PlaystyleBlaster

You draw the life force from every creature in a 30-foot cube centered on a point you choose within range. Each creature in that area must make a Constitution saving throw. A creature takes 10d8 necrotic damage on a failed save, or half as much damage on a successful one. If you reduce a hostile creature to 0 hit points, you gain temporary hit points equal to half the damage dealt. This power has no effect on droids or constructs.

Codex
Casting Period
1 action
Range
90 feet (30-foot cube)
Duration
Instantaneous
Concentration
No