HOw to make unit unkillable

[LmmcDarkY]

I would like to know how to make spell which is like Shadow Priests spell in dota.
Unit casts a spell on target allied unit making it unable to die - it recives damage but its hp can't go below 1hp... has anyone any GUI idea ?

 

[Avaleirra]

Check if a unit has a buff. Then if it does make it so it's health remains the same.

 

[FireBladesX]

You should use a damage detection trigger, and set unit life equal to (1 + damage taken) when damaged, with the condition that the damage taken is greater than or equal to the remaining hitpoints.

I just found this link for damage detection with the search function, I've never used it.
http://www.thehelper.net/forums/showthread.php?t=137957&highlight=damage

 

[Laiev]

use DDS from Jesus4Lyf and when someone cast the spell, give buff to x units, and other trigger will check when they takes damage, just block it.