Black Tentacles

Black Tentacles fills a chosen area with limbs of conjured black flesh. They push through the ground, walls, and other fixed surfaces, then seize every creature they can reach. The spell is indiscriminate: allies and even the caster are attacked if they enter its area.

Each creature in the zone attracts one tentacle. Once per round, that tentacle attempts a grapple using the effective STR in the table. The creature opposes it with STR or DEX under the normal grapple rules. On a success, the tentacle holds the creature until it escapes, the tentacle is destroyed, or the spell ends. A creature too large for that version of the spell cannot be grappled.

A tentacle is a physical object with its own HP and no DR. A creature it holds can attack it automatically; anyone else attacks it normally. A destroyed tentacle does not grow back, and that casting cannot create another one for the same creature. A tentacle that fails its grapple remains and tries again on the following round.

Once per round, a tentacle constricts a creature it is already holding. Its physical damage equals the damage of Hurl Rock cast at the spell level immediately below Black Tentacles. DR applies normally.

Spell level	Zone radius	Maximum target size	Tentacle STR	HP per tentacle	Hurl Rock equivalent	Constriction damage per CL
4	40 ft	Large	Spell DC	5 per CL	Level 3	2d12
6	80 ft	Huge	Spell DC × 1.5	10 per CL	Level 5	4d12
8	160 ft	Colossal	Spell DC × 2	20 per CL	Level 7	8d12
10	640 ft	Colossal+	Spell DC × 4	40 per CL	Level 9	16d12

The tentacles disappear when the spell ends, including severed pieces. Dispel Magic removes the entire field at once.