One/three advantages (no obvious ones, be creative):
1.You can hit your target directly
2. It can run along a cord or straight object.
3. You can use line of enemies
One/three disadvantages (no obvious ones, be creative):
1. Have to do 4 hand seals to activate jutsu
2. Cord could be broken
3. You could be attacked halfway through
How you would use it in battle: Wrap enemy in sting or wire and burn it.
How you would counter it: Soak string in water or cut it
How you perform it (with as much detail as you can): First you make the necessary hand seals and focus your fire chakra, katon, into a stream in your mouth nad blows it on the cord/ conductor and it will travel down it to burn your intended target aslong as they haven't countered it.
Question: You can move the cord and the kunai mid flight or wrap it around some part of them.
One/three advantages (no obvious ones, be creative):
1.One handseal
2. Projectile
3. stronger against wind styles
One/three disadvantages (no obvious ones, be creative):
1. Has to be paired with another jutsu
2. Twice as weak against water styles
3. Takes more time to use, due to the accompanied jutsu
How you would use it in battle: I would get a good distance away and use the
to make a defense against there attack and preform the Douton: Earth Dragon Missile jutsu and send it through the wall simutaniously releasing that jutsu and starting the Katon: Fire Dragon Missile jutsu and use the existing flames.
How you would counter it: making a wall of water our a cannon of water to take it out and turn the rock/ fdirt flying at you into mud or reversing the direction with a blast of wind on one end.
How you perform it (with as much detail as you can): (in how I would use it. Just follow along)