Because it's the god damn point!

['Kurapika]

Mid range, no water source, customs allowed. I'll be using my Kurapika bio, either post your bio and make the first move or just post your bio, it's up to you.

[★Kōrra]

Korra bio in sign she has two scythes and chains on her back.

*I throw a kunai with an explosive tag at you*

[Barocka Flocka Flames]

Obama: these two look strong *watches*

['Kurapika]

Korra bio in sign she has two scythes and chains on her back.

*I throw a kunai with an explosive tag at you*

With a Kunai thrown at him, aiming for his death. Kurapika performs a handseal but without any sort of effect, but without a second's delay, he waves his arm upwards, releasing five chains into the sky as he slams his foot unto the ground.
Just in time a thin jet of water emerges from the ground, racing towards his opponent and hitting the kunai in its path. At the very same time, the previously thrown five chains start to fall down in an arc shaped path, shaping what looks like a net. The spaces between them being too narrow for a person to fit out from.
(Suiton: Mizu Kamikiri) - Water Release: Rising Water Cutter

Rank: C
Type: Attack
Range: Short-Mid
Chakra cost: 15
Damage Points: 30
Description: After waving the Tiger hand seal the user slams his foot to the ground, causing water to rise up and travel towards his target as a slicing jet.

Kurapika not even taking a breath between his series of actions reaches out to his right arm in order to perform a single hand seal, letting him release a wave of lightning from his body incredibly quickly. The lightning, having two conductors to run through is divided between the water jet and the chains.
(Raiton: Kangekiha) – Lightning Release: Wave of Inspiration

Rank: B
Type: Offensive
Range: Short-Mid
Chakra cost: 25
Damage point: 30 (normally) 50 (when used in conjunction with water technique)
Description: After using a Water Style technique, the user releases a wave of electricity that can electrocute any water within range, electrocuting and knocking back an opponent in contact with the water. When used without a water technique, its power is moderate. The technique can be used extremely quickly, so that it finishes almost in conjunction with the previous jutsu.

Kurapika then makes the a massive number of mudshots shoot at his opponent from all directions surrounding him. These mudshots shoot at the his location and up above him in case he tries to jump up.
(Doton: Fukusuu no Dorosandan) - Earth Release: Multiple Mudshot Technique

Rank: B
Type: Offensive
Range: Short - Long
Chakra cost: 20
Damage point: 40
Description: This jutsu is basically a widespread version of the Mudshot Technique; allowing the user to fire at multiple targets.