Twicethinker’s Octad of Adaptable Arms

You touch a willing creature and imbue within them an essence of the sea. 8 Octopus arms sprout from the targets back, the arms have a ghostly appearance and drip water that vanishes when it touches the ground. The target gains 24 temporary hit points, for each 3 temporary hitpoints the target loses one of the arms vanishes. If the target chooses to gain temporary hitpoints from any other source this spell ends.

The transformation lasts for the duration, until no arms remain, or until the target drops to 0 hit points or dies. The arms take their turn immediately after yours. As a bonus action you can command them to take any of the following actions:

• Lashing Strikes: The arms make one attack roll against a creature up to 10ft away. This attack is made using the targets DEX + the number of remaining arms. On a hit each arm deals 1d4 of slashing damage.
• Defensive Stance: Until the end of their next turn the targets AC increases by half the number of remaining arms.
• Rapid Constraints: The arms attempt to grapple a creature within 10ft. This check is performed using the targets STR + the number of remaining arms. On a successful grapple the creature is dragged to within 5ft.
• Agile Mobility: The arms carry you in a direction of your choice to a distance of 5ft for each remaining arm.
• Oceanic camouflage: The arms take on the colour and texture of your surroundings while wrapping around you, you can make a Stealth check + the number of remaining arms.

If you do not command them, they will continue to do the last action taken, if no action was taken previously, they will do nothing.

At higher levels. When you cast this spell with a 4th level slot or higher, you gain an additional 8 temporary hit points for every level above 3rd, as a result, each arm will have 1 extra hit point needed to remove them for every level above 3rd.