Draw Conditions Spell Help

[Xzalious]

I am making a spell called "Draw Conditions" and there are 2 parts for this spell, one of which i have no idea how to accomplish.

When cast i want the spell to take ALL negative buffs from all nearby friendly units and give them to my unit, and it's the storing which buffs were taken part i can't accomplish, once i have them i was planning to get a dummy caster to buff my hero.

The second part is a simple healing of the unit for as many buffs it has taken.

If anyone could help or provide some insight that would be most helpful.

 

[Metov]

could use spell steal ability to move the buffs? just an idea, im not exactly sure on whether it will work or not