Casting Aura on Enemies

Okay, what I want to do here is actually pretty complicated, so bare with me. I want to do "Curses" like with D2's necromancer, and I need the ability to CAST an aura on an enemy, with a limited duration. Not only that, but I'd like the aura to affect all enemy units within range around it and do something like, say, Life Tap. I've tried several things, but I can't get it to be castable, it's always passive. I wish there was a field that you could change for that. Also, for it to work properly, it needs to be like a reverse Thorns Aura (damage percentage returned as healing, instead of damage), but negative percentage values do not result in healing. :(

Anyone have any ideas on how to accomplish what I'm trying to do?

You'd have to do it through triggers

I've never actually done a spell like this through triggers, but I believe it goes osmething like:

Make a spell just for the hell of it, use a spell that targets enemies like a DD spell but make it do no damage. Next, make the aura you want. Spells done.

TriggerS:

Event-Target Unit is Issued an order etc.

Condition-Issued Order equal to (Order(Sleep))

Action-Give Hero ability (aura) etc.

I'm not sure if that'll help or not, but try it anyways. I don't know the exact wording for the triggers cause id on't remember them word for word.

Thanks for the quick response, but I still can't seem to get a reverse thorns aura to work -_-

And I'd rather avoid trigger-based spells, if possible.

Whoa, I just thought of how to do this near-perfectly using Silence. Thanks for the help. I have no idea how I'm going to make another curse, though, if there's only one silence =/

Man, don't say "I don't want to use trigger" because you simply don't know...
It's easy to make a dummy spell (sleep would be good in this area) and then making a special effect at the unit who is cursed until it goes away. And do dmg to him for as long as he is cursed, as well as units within 1000 range or whatever of him, in the same block as him (his allies).

That is extremly easy to make by making two triggers, it might even be possible to do with one, do you want me to make it? (Argh, never mind I don't have TFT yet... I gotta go buy it... lol)
Oh, well, I can type it up for you instead, step by step...

Regards
Dead-Inside

It's not because I don't know how, it's just I'd rather find a way to do it directly with a spell. Dunno.. seems more interesting that way

Edit: But, if for some bizarre reason you really WANT to type it up... feel free. emote_sweat