You can kind of see this is going to be short. Ice magic can be mixed with dark magic. Ice is more powerful than most people think.
Ice Blast: Its in the name its a blast of ice... but a little wispy...
Shards: send tiny sharp ice shards to your enemy
Dark Ice: must have a little dark magic. Freeze your Enemy in a cage of dark ice and they can't get out and can die if you really want them to.
Frost Bite: they die of frostbite soon when you use it on someone and you want them to die then make sure they are human or an elf. (Frost was named after this by her mother...)
Ice fangs: Its not really dangerous it just give the user vampire-like fangs.