Black Tentacles

Black Tentacles

4th-rank - Wizard Spell: Conjuration

Casting Time: 1 action

Range: 90 feet

Duration: Concentration, up to 1 minute

Components: V, S, M

Materials: a piece of tentacle from a giant octopus or a giant squid

Auditory Sensory Effects: Moderate

Visual Sensory Effects: Gargantuan

Olfactory Sensory Effects: Moderate

Casting Perception Mod +4

Effect Perception Mod +12

Deep red hissing aura coalesces into squirming, ebony tentacles, which fill a 20-foot square on ground that you can see within range. For the duration, these tentacles 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 succeed on a Dexterity saving throw or take 3d6 Bludgeoning Damage and be Restrained by the tentacles until the spell ends. A creature that starts its turn in the area and is already restrained by the tentacles takes 3d6 Bludgeoning Damage.
A creature Restrained by the tentacles can use its action to make a Strength or Dexterity check (its choice) against your spell save DC. On a success, it frees itself.

At higher ranks: