You mean like:
The unit has remaining HP of 33/100
It doesn't get attacked for the last 5 seconds
In and instant after 5 seconds of not getting damaged/hit, his HP straight recover back to 100/100 ?
Tell me, is this unit only available only once per game ?
Or, it can be used as more than one ?
I mean we can buy/create this unit more than 1 in a game