Dyrnn's Tentacle Whip

As a bonus action, you can sheathe the whip by
caus­ing it to retract into your arm, or draw the
whip out of your arm again.
Symbiotic Nature. The whip can't be removed
from you while you're attuned to it, and you can't
voluntarily end your attunement to it. If you're
targeted by a spell that ends a curse, your
attunement to the whip ends, and it detaches
from you. The whip needs to be fed and
requires 1d2 hit dice after every long rest.