Arcanomechanical Prosthetic Leg

This Prosthetic Leg is used as your normal leg, but with some upgraded from the previous arm that you had.
Having an leg like this is expensive, specially if you are growing up with the multiple changes of your body is facing, and not everybody knows the your race anatomy enough to know how to reattach limbs and connecting nervous tissue and also know the arcane arts to make such wondrus item like this one.

This leg is divided in 4 parts:

• First part is the connection to the nerves that is surgically attached to the side of the hip where the leg should be starting, this connects to the nerves directly and attaching a new leg is always painfull procedure.
• Second Part is the upper leg where you store a pouch or a dagger but nothing much bigger than that or you can have three crystals with 1st level spells that imply using your legs somehow, just like the spells: Jump, Longstrider, Feather Fall or Expeditious Retreat, and this spells are only cast on yourself and no one else.
• Third Part is the lower leg that is similar to the upper leg, can store one dagger or a pouch but nothing bigger than that, unlike the upper leg the lower leg has bit of less space. Or, just like the upper leg, you can have three crystals with 1st level spells that imply using your legs somehow, just like the spells: Jump, Longstrider, Feather Fall or Expeditious Retreat, and this spells are only cast on yourself and no one else. 
• Fourth Part is the foot where you have one crystal that you can store a 1st level spell into it. You can change the crystal with another that has another spell store by in order to use it the crystal needs to be attached to its proper socket.

You can only have four crystals in this leg, being one of them in the foot, at anytime, if you put more than four crystals you might overcharge the leg and make in unusable needing you to getting fixed or even getting a new one. The user of this leg can use this as small explosion, while having six crystals attached to the leg and use them all in the same time, creating a small explosion causing 6d6 fire damage in a 60 feet range, every creature within range makes a Dex Save of 16, on a failed save takes full damage and on a sucessfull takes half damage. You can only activate the six crystals if you are attune to the leg and you can use them without being attached to your body. After the small explosion the leg is rendered useless.

While Attuned to this leg you can also use the spell levitate at will.

Chaging a crystal or a detachable part requires one action of combat to change.

Due to the magical nature of the prosthetic limb the magic can be dispelled by the means of the spell dispel magic rendering it unable to perform correctly but can be fixed if you spend an short rest imbuing magic into again.
You also can use an coating spell mechanism that protects your limb to be dispelled or targeted spells. The coating itself protects it for 5th level spells or lower and it costs an additional 500gp to the arm and for each level higher than 5th is an addional 100gp.

This limb was design to fit in one creature only. If by any chance you try to put the part of the limb on another connection that is not the the one it was designed for, the most likely thing to happen it is to malfunction and cannot attune to the new limb that was just attached. With this said, there is temporary arms that are used beetween fixing an prostethic limb, this prosthesis does not have any fuction besides being used as a temporary limb, any skill used while wearing it that is dexterity or strengh based is with disadvantage because you are not used to it and the limb itself its not meant to be use in hard labour or anything similar.