reversing what spells do

how would i go about reversing what spells do

e.g. Heal it heals units that are allowed to be targeted, i want to rever what it does so it hurts not heals

how would i do this?

For heal just give it negative values, I think.

It wont let you put in negative values. how would u do that??

yeah i found it. It was in file under "preferences" it allows to have negative values. but it warned me coz it mite crash the game hmmm...:bgrun:

thanks anyway guys:D