Tendrils of sickening energy coil around the bodies of all creatures within 5ft. of a point of your choice that you can see within range, binding their muscles to prevent them from moving. Each creature must make a Constitution saving throw. On a failure, they take 1d6 necrotic damage, and they cannot take Reactions until the start of your next turn.

The area of this effect increases by 5ft. starting at 5th level (10ft.), 11th level, (15ft.) and 17th level (20ft.).

Invocations

Decaying Miasma
Prerequisites: Abberant Grasp cantrip
When a creature takes damage from abberant grasp, they suffer disadvantage on ability checks and saving throws until the start of your next turn.

Touch of the Veil
Prerequisites: Abberant Grasp cantrip
When a creature takes damage from abberant grasp, attack rolls made against them gain a bonus equal to your proficiency modifier until the start of your next turn.

Goosebumps
Prerequisites: Abberant Grasp cantrip
When you deal damage with the abberant grasp cantrip, you can choose to deal cold or psychic damage instead.

Possession
Prerequisites: Abberant Grasp cantrip
When casting the spell abberant grasp, you can choose for the verbal components of the spell to take the form of a whisper that only a single target within range can hear. Only that target is affected by the spell, and no other creature becomes aware that the spell was cast.

Clutch of the Void
Prerequisites: Abberant Grasp cantrip, 5th Level Warlock
When a creature takes damage from abberant grasp, their movement speed is reduced to 10ft., and they lose any flying, swimming, or climbing speed until the end of your next turn.

Bind Tongue
Prerequisites: Abberant Grasp cantrip, 9th Level Warlock
When a creature takes damage from abberant grasp, they lose the ability to speak or understand any language until the end of your next turn. Attempting to speak produces only gibberish.

Dark Puppetmaster
Prerequisite: Abberant Grasp cantrip, 12th Level Warlock
When a creature takes damage from abberant grasp, they must immediately make a melee weapon attack against a creature of your choice within range.