I will go first. Obito Uchiha in signature.
Once seeing the mysterious opponent (???), Obito decides not to waste time, straight to the business. He performs the Snake handseal kneads his Lightning chakra and shoots a very fast, lightning spear with his hands. It was aimed at the opponent's stomach area, this said it had great accuracy. Then Obito shoots a huge fireball which would explode, causing a maelstorm to occur.
(Raiton: Gian) - Lightning Style: False Darkness
Rank: S
Type: Attack
Range: Short-Long
Chakra cost: 40
Damage Points: 80
Descripton: The user, after performing the Snake hand seal, emits lightning in the shape of a spear from their hands or mouth which then pierces the enemy. Kakuzu, the original user, shoots the technique from his Lightning mask's mouth. Its destructive power is great enough to even pierce through rock; meaning it has a high killing potential. The user can increase the number of spears to attack multiple enemies by branching the main spear. This, coupled with the sheer speed of the lightning, makes it a difficult technique to evade. This strong attack can be defended against by an equally strong attack of the same element such as Raikiri.
(Katon: Gōka no Jutsu) - Fire Release: Hellfire Technique
Rank: A
Type: Offensive
Range: Short - Mid
Chakra cost: 30
Damage points: 60
Description: The user will manipulate their chakra and breath out from their mouth a large fireball that travels at the opponent. As it reaches the opponent it bursts into a maelstrom of fire engulfing them in flames.
Byakugan is passively activated just in case, i forgot to mention it above ;-;Seeing how the foe countered the Fireball with the water technique, Obito performs one handseal (specialty) and gathers huge amounts of fire chakra, sending it below the area the enemy is standing. Applying shape manipulation, Obito converts the chakra into fire which bursts from below the legs of the enemy, taking the form of a rapidly gorwing tree,(it grows upwards, ofc) which can reach up to 15m. This utterly burned the enemy to ashes, leaving no trace of him behind.
(Katon: Fenikkusu Ki) – Fire Style|Phoenix Tree
Rank: S
Type: Attack
Range: Mid-Long
Chakra Cost: 40
Damage Points: 80
Description: Performing the Tiger, Horse, and Rat handseals the user will concentrate a massive amount of fire chakra deep into the ground below the enemy. Like an eruption the fire will burst through the ground and take the form of a rapidly growing tree that expands upwards (up to 15 meters) ripping and scorching through the earth and burning everything near it. After the technique is over, it leaves the area a barren scorched land.
Being lifted in the air by the water pillar, the opponent'd evade the fire. Meanwhile Obito would knead his fire chakra while weaving one handseal, and releasing a fire stream which widens as it travels towards the enemy who now entered the short range. The fire stream now is huge enough, to kill the enemy.
(Katon: Gōen no Jutsu) - Fire Release: Great Flame Technique
Rank: S
Type: Offensive
Range: Short - Mid
Chakra Cost: 40
Damage Points: 80
Description: The user does one handseal and inhales while molding a great amount of chakra into their lungs and expelling a large stream of flames from their mouth. The user has control over the concentration of the technique, being able to produce a narrow jet of flames, highly concentrated or one that will widen along its range. The flames are hot enough to quickly evaporate large quantities of water within a relatively short amount of time.