First technique is used to conceal one's self in the rain, by assuming a form that mimics the rain after performing numerous hand seals.
Second technique allows the to condense a single rain drop into a more solid form, making the raindrop become as sharp as a blade.
Third technique allows the user to create small sized spike of water from puddles on the ground.
Right well, all these are pretty simple:
(Ame no Yari) - Rain Spear
Type: Offensive
Rank: C
Range: Short-Mid
Chakra: 15
Damage: 30
Description: By using chakra to condense a large amount of rainwater into one place, the user creates a spear of water in the clouds. The spear can at any time be called down to strike an opponent with only one hand-seal. The water will stay in the form of spear for a short amount of time (three posts). If the spear is not used by that time it will fall uselessly as rain. The only warning this technique gives is a second pause in the rain when the water is gathered and condensed.
(Ame Nottori no Jutsu) - Rain Capture Technique
Type: Supplementary
Rank: C
Range: Short-Mid
Chakra: 15
Damage: N/A
Description: This technique causes a target of the user's choice to "attract" raindrops. The water in the rain drops will attach themselves over an opponent. Once enough water has gathered over an enemy it will also attach to the ground, holding the user's opponent to the ground.
(Ame Bunshin) - Raining Clones
Type: Supplementary
Rank: C
Range: Short
Chakra: 15
Damage: N/A
Description: A jutsu that creates false clones of the user around drops of rain. Every clone is totally harmless and is destroyed by one hit or if they collide with the ground or the enemy. This technique is used as more of a distraction than anything.
(Gouu no Jutsu) - Heavy Rain Technique
Type: Supplementary
Rank: C
Range: Short-Mid
Chakra: 15
Damage: N/A
Description: A jutsu that actually uses the victim's clothing as a medium to effect him or her. By filling the clothing with water-elemental chakra the user causes the clothing to fully retain all water it comes in contact with which will gradually cause the clothing to become heavier and heavier. Unfortunately, this jutsu that does not create water, so it is only useful in a rainy or otherwise wet environment