Summoning One Or More Units

[Jeeyo]

How can I make a skill with an effect like this:

Lv. 1-hero summons 1 unit
Lv. 2-hero summons 2 units
Lv. 3-hero summons 3 units
Lv. 4-hero summons 4 units

The summoned units last for the whole game and if the hero clicked the ability while the unit are still alive, the summoned units will only restore hp

 

[Squishy]

Base your ability off of Feral Spirit and set Data-Number of Summoned Units and Data-Summoned Unit to what you want.

 

[Zaraf]

I believe if you set the life span of the summoned units to zero, they will be permanent.

 

[THE_X]

you could base the ablity off of fan of knifes or something and when you activate it you have a dummy spawn #of units depending on level of your ablity and then add those spawnd units to a unit group and after you've spawnd those units you could set a variable saying yes i have units on the field and if you reclick that ablity and your ablity says you have units on the feild it selects all units in that group and restores there hp.