Tendrils of eternal night

9th-level conjurationCasting Time: 1 roundRange: 120 feetComponents: V, S, M (black pearl worth at least 5,000 gp)Duration: Concentration, up to 1 minuteYou open a portal in the ground to the Negative Material Plane. The portal forms at a point you can see within range, creating a 10-foot-diameter hole. Each creature standing in this area must make a Dexterity saving throw or fall into the portal. Any creature entering the portal becomes paralyzed and has their hit point maximum reduced by 10 at the start of each of their turns. A creature in the portal can attempt a Constitution saving throw at the end of each of their turns, with success ending the paralysis. Once the portal opens, four shadowy tentacles wriggle out from the hole. Each tentacle attacks an enemy creature of your choice within 20 feet of the portal, using your spell attack modifier. On a hit, the target is grappled (escape DC equal to your spell save DC + 2). Until the grapple ends, the target is restrained and has disadvantage on Strength checks and Strength saving throws.The round after grappling a creature, as an action a tentacle can reel in its victim, dragging the creature 10 feet closer to the portal.Each tentacle can be attacked normally and damaged by spells or weapons. A tentacle has AC 20 and hit points equal to your level x 3 and uses your saving throw modifiers. If a tentacle is destroyed, another tentacle rises from the portal to replace it at the start of your next turn The portal closes when the spell expires. Once the portal closes, any creature trapped inside is considered slain (or simply lost if immune to life drain) unless they can cast plane shift or a similar planar travel spell. Otherwise, victims can only be brought back by using wish or a similar spell.