"Indeed, it makes it stronger and colder, so its definitely a good combo against wind. Now as for the most deadly Ice jutsu of all;"
(Hyouton: Makyō Hyōshō) Ice Release: Demonic Ice Crystal Mirrors
Rank: S
Type: Attack
Range: Short-Mid
Chakra Cost: 40 (+10 extra per turn, excluding the first turn)
Damage: 80
Description: The user will make a dome of 21 ice mirrors surround the opponent. Twelve are at ground level, eight are above the first twelve and placed at an angle so that they face slightly downward, and the last one is place directly at the top and center of the dome, facing directly down to the ground. The user can move at extremely high speeds that only the Sharingan can keep up with and manage to dodge while in this dome. The user can freely leap in and out of the mirrors as they wish and move to the other mirrors if one is destroyed, but the jutsu requires so much chakra to maintain that the users movements become progressively slower the longer they hold it (after three turns have passed a normal ninja can keep up with it for the most part) and they cannot perform jutsu while using this. When the jutsu is first starting, though, the user can move so quickly that it looks as though they are in, and attacking from, all 21 mirrors simultaneously. This jutsu was very resistant to fire jutsu, and can only be melted by fire of its own rank or greater, and cannot be destroyed by wind or water alone (both would basically empower it) unless it is of forbidden rank. A single ice mirror (or any number less than the complete set of mirrors) can also be created that the user can use as a shield and go in and out of it through both sides.
(Hyouton: Makyō Hyō Satsu) Ice Release: Mirror Ice Murder
Rank: S
Type: Attack
Range: Inside of the Demonic Ice Crystal Mirrors
Chakra Cost: 40
Damage: 80
Description: The user will detonate all of the mirrors after using “Ice Release: Demonic Ice Crystal Mirrors” causing an enormous explosion, damaging all inside. Meanwhile, using the great speed granted to them by the jutsu, the user will leave the mirrors at the last second before they explode.
Note: Only usable while “Ice Release: Demonic Crystal Ice Mirrors” is active.
Start by creating Once Ice mirror, then move on to creating more, and then try to blow them up. Then do the jutsu once again and blend with ice moving freely in the mirrors.