Some training with Nagato..

[Nagato..]

As you asked..

(Kuchiyose: Makigai Ouja) – Summoning Technique: Conch King
Rank: A
Type: Supplementary
Range: Short
Chakra cost: 30
Damage points: N/A
Description: The Conch King is a summon that is made of three segments. Despite being called a conch king the tail is the only representative part of a conch, while the other two segments represent an oyster. The way he uses his techniques is by the user using hand seals whilst standing upon the top the summon.
Note: Only a member of Amegakure can teach or learn.


*Summons*

Now you try to summon one of similar size, by making the necessary handseals etc etc

 

[Kuroh]

I begin to gather a large amount of chakra all through out my body. I then perform a set of hand seals and then i slam my hands into the ground, summoning The Conch King.

So by performing hand seals on top of him he can use techniques. So he can use any element as long as i'm standing on top of him? How long does it stay on the battlefield before disappearing?

what uses does this summoning have? that's basically my question.