Hello Max.. Hi max.. Max hp? of unit? are you max? max hp? hp sauce?

ok I need to change max hp of one unit, is this possible?
Without using handicap I mean..

LIke if i have a footman
Set maxhp to 120% of orignal max hp ;EEE

I would please not do this with the set current hp to 20% of unit and then raise that percentage, because then the players can see how much hp the units will have at higher levels ;(

You can add an ability that adds x amount of hit points to the unit