Add a hero ability that is still level dependent?

[Paladia]

Its a simple problem yet I didn't find any solution for it. I want some heroes to start with an ability as learnt but unusable until they reach the appropriate level.

I appreciate any help.

 

[reza sword2]

Maybe make the ability require an upgrade, then when the hero reached X level, set the upgrade to finish so that the hero can use the ability. But the "upgrade complete" message would come up and it'd look ugly.

Another is to make two versions of the ability, one requiring an upgrade and one that don't require an upgrade. The hero starts off with the ability which requires the upgrade, but when the hero reaches X level, replace the ability that needs the upgrade with the other one which requires no upgrade.

 

[Avator]

When the ability is learned, check for the hero's level. If the level requirement isn't met, replace the ability with a passive ability (with passive icon) without the effect.
When the hero levels up, check which ability's requirements are met and replace those with the real abilities.

 

[M4stah]

If it is a triggered ability make a trigger like

If level of hero is greater than or equal to {you value}
then {your action{
else: Display message to (owner of (triggering unit)) The level of the hero is not high enough.