Make Unit Unkillable

[Hoernchen]

Hey, I am trying to make a spell like DotA's "Shallow Grave" spell. For those of you who don't know what this spell is, here is a description:

Target allied hero will not be able to die for the next X seconds. Damage taken by this hero will not be able to drop the heroes health below 1, thus any damage taken by the hero will alter his hp but not kill him.

If anyone knows how to achieve this effect, please post.
Thanks in advance and +rep to people who help.

 

[PurplePoot]

Whenever the unit takes damage, heal them for the amount of damage taken such that their life must be healed to (damage taken) + 1 if it is less than (damage taken) + 1.

 

[Hoernchen]

No no, see for I don't want to prevent the unit from taking damage, just from taking lethal damage. So that if it takes 50 damage and has 100hp its health drops to 50. But when it has 30 health and takes 50 damage its health drops to 1 instead of dying.


EDIT: I just tried what you said and stunningly it works. I did not realize that the Damage Taken trigger fires before the damage is actually dealt to the unit. Thanks.

 

[PurplePoot]

All events fire before the event that triggered them actually occurs them.

 

[Hoernchen]

Good to know that. Thanks again.