By inscribing a few sigils into the air, shimmering arcane chains with a shining point erupt from the ground and strike at creatures.

For the duration, these chains turn the ground in the area into Difficult Terrain.

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, taking 3d6 Arcane damage and potentially becoming

Restrained

Critical Success (+10). The target is unaffected.
Success. The target takes half damage.
Failure. The target takes full damage, is Restrained for the duration of the spell, and all magickal effects of 4th-Level or lower on it are dispelled. For any magickal effects of 5th-Level or higher, make a spellcasting ability check (DC = 10 + the spell's level). On a success, the effect is dispelled.
Critical Failure (–10). As failure, except the target takes 1.5× damage.

A creature that starts its turn in the area and is already Restrained by the chains takes 3d6 Arcane damage and is unable cast spells while Restrained. A creature Restrained by the chains can use its action to make a Strength or Dexterity check (its choice) against your spell save DC. On a success, it frees itself.