need help on making map.

hey, i'm making a dota style map, and on making abilitys i got some probs...
1º: how do i make a negative aura? to affect enemys only, and to like, add -armor.??
2º:my abilitys dont skip lvls....i mean, the hero can learn the same ability like, right after another....like this : hero lvl 1 choses storm bolt, then hes lvl 2 and can chose again storm bolt...see what i mean?? it doesnt skip lvls...
i changed the lvl skip requirement on the ability editor, but it doesnt work...how do i do?? which number do i use on lvl skip requirement?? 1, 2?, 0???
plz help me!!

You can probably find complete answers to these questions by using the forum search feature.

To allow negative values in the object editor, you can either shift-double-click when you're editing the field, or set the editor to Allow Negative Values. Then you simply have to change the aura's targets from Friend to Enemy.

Abilities, by default, skip levels. If you have 0 in the skip field, it will use the default interval defined by the Advanced>Gameplay Constants.

the negative aura thing worked, but the skiping lvls, i cant find anything like that on game play constants...if u could tell me the name of the constant i need to edit i would thank u.

Advanced > Gameplay Constants > Hero Attributes - Abilities Level Skip (Default)

Just set it to what you want.

If it's 1, you can learn the spell at level 1, 2, 3, etc.
If it's 2, you can learn the spell at level 1, 3, 5, etc.
If it's 3, you can learn the spell at level 1, 4, 7, etc.

It can of course go higher, but those were just examples.

thx for the help