Parasyte arm(right)

Second stage. After parasyte enters the host it reaches full maturity in 1 minute, becoming fully synchronized with the host. Replacing the body part it targeted, parasyte resembles their host. They can morph into various shapes and extend and harden certain parts of their body as they desire, granting you the following benefits:

• Change Form. While attuned to this weapon, you can use a bonus action to change this weapon's form into any other melee or ranged weapon. For example, you can use a bonus action to turn this weapon into a +1 longsword, and then a subsequent bonus action to turn it into a + 1 crossbow.