Black Tentacles

V, S, M; Concentration - 1 Minute
Ebony tentacles fill a 20 ft square on the ground
that you can see within 90 ft; difficult terrain.
Enters area or SoT, DEX ST, take 3d6 blud and
restrained. Already restrained auto 3d6 blud.
Action: STR or DEX check (its choice) against
your spell save DC. On a success, it frees itself.