I heard one time that the Orc burrow cargo hold ability disables the attack of a unit. So you can give the unit that ability and remove it when you want it to be able to attack again.
Not immediately. The unit remains in the game for a while (depending on death and decay time) but after that, the unit (not hero) will be removed completely from the game
Is there also a way to change the z-rotation while in game?
I want my arrow-projectile (dummy unit) to point the right way, and it's flying in an arc..
You should make a periodic trigger (that runs every 1 second) that heals units after 3 seconds, by using some kind of integer (like custom value if you want it to be MUI, or hashtabel, of if it's just for one person, or 1 hero per player, you can use a variable with array) that counts the...
You better use the Channel ability. If you use any other spell more than one time in the same unit, it will not work together. Look for a tutorial of Channel (here on the helper is 1).
Also, you'd better don't use both events, because then the trigger will run twice. In general, you should use...