Freezing field

I want my hero to shoot random frost novas around himself. If you play DOTA then the crystal maidens freezing field is what i want.

I dont think thats possible, unless there is an enemy unit in ther area because Frost Nova (the ability) can only target enemy units
Otherwise just use the 'Unit-Issue Order targeting a point' trigger function to order that hero to cast Frost Nova in a random point in a reigon.

I think what you should do is base it off flame strike, have no casting time, change the fire to ice and the buffs to ice rather then burn. That is, if you cant do what raichu said. Dont forget to create another unit first and then have it cast it.

Well every few seconds you could spawn a random dummy unit that casts frost nova on itself, damaging everything around it and also solving the problem of leaking since it kills itself anyway. And if that poses problems (like they attack the dummy unit) then just remove it by triggers.

Freezing Field is a spell made by Darky28, you can find it here. You can find about 90% of dota allstars spells at that site as well :-P

Freezing Field can be made just using a normal Object Editor. But you must make 1 unit and 2 other abillities before that I make it and it was on 1.7 version :8