hero's shield

Name: Shield

Appearance: Well normally the shield is about 2 centimeters tall and wide and long. It is a wooden shield so it is brown in the middleon the perimeter of the shield it is silver. In the middleof the shild there is a silver circle that sticks out one milimeter When hero inserts his chakra in to the button the shield transforms. The shield is no longer wooden. It is about 4- 5 feet tall. It also has 16 bands of brown rubber tapped on the perimeter (to counter lightning attacks) .It is now metal and that circle is still in the middle.It now pops out to be a inch taller and 1 cenitmeter wider.Igf the btton is pressed again it turns back to normal size.

Rank: C

Special Abilities: When chakra is stored in the shield it two times stronger than it was before. Also it is two times heavier so hero won't be so fast to block attacks unless he's prepare in his stance.Lastly when chakra is stored it can resemble the user's main element example. Mine is fire so the shield will ignite on fire. Get it. That may come in handy while doing jutsu's or even combat.

Origin: The day hero got his sword another mysterious thing happened. Hero was traning with his sword and saw a small little circle in on the sword. Hero tried to take the little thing off of his sword but it would not come off. So (accidently) tried to pull it from the center and he pressed on the little button in the middle. It suddenly grew 4 feet taller and it was constantly growing rubber on the shield.
Hero backed away thinking the shield was going to kill him. The shield slid off the fire sword and just sat there. Hero got a stick and poked it a few times. Hero was releved. hero wielded the sword in the air high and mighty. He knew was ready for battle.

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It can absorb or even shoot back certain jutsus. For example, If a person shot a c ranked lughtning bolt and hero raised the shield to protect him self lightning willl be stores in the 16 pieces of rubber .Even if the lightning hit the center of the shield the lightning will then travel to all 16 pieces of rubber which is permantly on the shield.Hero can then choose to keep lightning stored in the shield until a next battle or he can shoot the lightning from all 16 pieces of rubber back at the opponent (causing more damage than it would've to hero). This shield can do that to all other elements as well, but this time hero has to store his own chakra in the pieces of rubber.

This is incredibly OP and I have a few questions.

1. do you have the weapon specialty.
2. Rubber doesn't conduct electricity, it's an insulator, you couldn't store lightning in it.
3. shooting back lightning would do far less damage because of heat tax.

edited took out the whole lightning part

Do you have weapon spec?

yes

I have trouble even considering the weapon expanding like that at the push of a button unless there was some sort of spring loaded mechanism and it was built to colapse in on itself, efen then it wouldn't get as small as you describe. Further, the part about it becoming two times stronger is very vague. In what way? Is it more durable, does it strike with more force? How does charging it add weight to the shield? If you want the ability to use a weapon with elemental chakra you need to call it chakra conductive. My suggestion is to get rid of it's size changing and all the rest of the stuff and just ask for a chakra conductive shield with listed measurements, otherwise the shield will likely end up as a higher rank then C, thus making it too high for you.