Well for the first one is pretty simple, you make two hand seals and change your raw chakra into ice release chakra then release the chakra into the air. You manipulate that chakra to form above the opponent by sending the chakra into the atmosphere. You would proceed to use shape manipulation to turn the ice into several small and thin layers of razor looking sharp thingies of ice. As it moves down it would aim to cut the opponent, cutting into their head or where ever you decide to place it at as it doesn't have to be only the head. Upon this it would cause internal damage.
For the second jutsu is also pretty simple. Putting your index finger and thumb together you would begin to focus your ice chakra in between them, following the same steps as before to manipulate that chakra into a needle like senbon between those two fingers. Afterwards you would charge the needle with chakra, manipulating the shape it, making it longer. Its thin to the point where its barely noticeable to the human eye, similar to that of wind blade, however dojutsu users can detect it whether its in the dark or not. Due to the thinness it can be shattered very easily if the counter has the power to do so, almost anything that can shatter it and isn't as powerful when attacking from the side, because of the drawbacks its only fatal when its shot in a straight direction.
Good. With the first one, note that it can only be used in the downward direction, and it's not going to do a whole lot if the blades are created like right on top of the opponent. They need a bit of room to pick up speed.
Next:
(Hyouton: Bakuhatsu Fuyu Uzu)-Ice Release: Explosive Winter Vortex
Type: Offensive
Rank: Forbidden
Range: Short-Long
Chakra: 50
Damage: 90 (-20 to the user)
Description: The user performs 3 hand seals and focuses a massive amount of chakra into a single point in the sky. After the hand seals are complete, the user will manipulate the chakra to form a fast-moving downward swirling vortex of ice, snow, and wind, and there is now hollow point in the middle of the vortex. The vortex is quite narrow at the point of the creation and becomes wider as it moves towards the ground. Anyone caught in the vortex will be rotated at great speeds and slammed into the ground, in addition to being impaled by the ice shards. The vortex can last one full turn if the user wishes. After the vortex ends, all of the snow, wind and ice shards within it will burst outward to a mid-range away from the vortex. Anyone caught in this explosion, including the user, will be knocked backward by the wind and snow, and impaled by the ice shards, though both effects aren't as powerful as they were in the vortex due to the now unfocused and spread out explosion.
Note: The user is only able to perform a total of 2 jutsu the turn this was used.
Note: The user will be unable to perform anymore forbidden jutsu for the next 4 turns.
Note: The user will feel exhausted the turn after this was used and will have slowed movements.
Note: Requires the user to have mastered ice.
(Hyouton: Aisuu~ēbu)-Ice Release: Ice Wave
Type: Offensive
Rank: S-Rank
Range: Short-Med
Chakra Cost: 40
Damage Points: 80
Description: The user makes four hand seals and stomps there foot on the ground. As they do so, they make a large 'wave' of icicles appear out of the ground, which are in turn directed at a target. The icicles are positioned so that the tips are pointed directly at the target. The icicles are extremely sharp and dense. The wave measures to be around 3 meters tall and 8 meters wide.
Note: Can only be used twice per match.
Note: No S-Rank or above Ice Jutsu next turn.
Note: Must wait three full turns before using again.
Same thing.