Tasha's Toxic Tentacle

You throw a vial of acid at a point within range, and a slimy tentacle bursts out of the puddle that lasts for the duration or until you cast this spell again. When you cast the spell, you can make a melee spell attack against a creature within 10 feet of the tentacle. On a hit, the target takes acid damage equal to 2d8 + your spellcasting ability modifier. Alternatively, you can use the tentacle to attempt to restrain a creature. If you do this, the creature is restrained on a failed Dexterity save against your spell save DC, and can attempt to break free at the end of each of it's turns with a successful Strength or Dexterity save (creature's choice) against your spell save DC. The tentacle cannot attack or attempt to restrain a creature while it already has a creature restrained.

As a bonus action on your turn, you can repeat the attack against a creature within 10 feet of it.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you can deal an extra 2d8 damage for every two slot levels above 2nd.