Jet Pinnacle

The jet stone in your hand expands into a shadowy mass resembling a tentacle with a sharp point. For the duration of the spell, you can make up to two attacks with your tentacle against targets within 60 feet of it. Make a spell attack for each strike of your tentacle. The tentacle deals 8d8 shadow damage, and its attacks ignore cover. Using a bonus action, you can reposition this tentacle to an unoccupied space within 30 feet of you.

The tentacle has AC 24 and hit points equal to 100 + 10 times your spellcasting ability modifier. The tentacle disappears when its hit points are reduced to 0, when the spell ends, or if you use a bonus action to end the spell.