Holocron

Saber Dance

Force power · Level 4 · Universal
power-typeForcelevel4alignmentUniversalconcentrationtrue

⟜ Requires Animate Weapon

Tweaked from 5eYou already know this as 5e Blade Barrier — It's Blade Barrier's whirling-blade damage zone (same 'enters or starts its turn, Dex save for half' trigger), but instead of a wall you place at range it's a 10-ft aura centered on you that moves as you go and halves your speed.
Spin a weapon in a 10-foot aura; creatures entering or starting their turn there take 4d10 weapon damage on a failed Dex save.
ControlDamage
●●breadth · halves your movement
TargetingArea
Use whenenemies are swarming you and you can afford half movement speed
ScalingAt 5th level or higher, radius grows to 15 feet and damage increases by 1d10 per slot above 4th.
!Requires concentration and the Animate Weapon prerequisite; your movement speed is halved for the duration.
kineticarea-denialcontrol-condition
Pairs withAnimate Weapon · tanky melee build · forced-movement synergy
PlaystyleControllerBlaster

A light- or vibro-weapon of your choice that you are wearing or carrying begins to animate, spinning around your body at high speeds in a 10-foot radius centered on you. For the duration, your movement speed is halved, and the weapon moves with you.

When a creature enters the affected area for the first time on a turn or starts its turn there, the creature must make a Dexterity saving throw or take 4d10 damage of the weapon's type, or half as much damage on a successful saving throw.

When this power ends, you can immediately recall the weapon to your hand.

Force Potency. When you cast this power using a force slot of 5th level or higher, the radius of the power increases to 15 feet, and the power's damage increases by 1d10 for each slot level above 4th.

Codex
Casting Period
1 action
Range
Self (10-foot radius)
Duration
up to 1 minute
Concentration
Yes