Condition Requirement. Level Of Ability Check

[Expired_Milk]

Hey people, im making a map, and an ability is based soully on a trigger. The ability is time stop. So i used myself a 0 stun, 0 dmg, 0 length, stuff like that of a warstomp, and i made a trigger that if used then it freezes all enemy units for so and so seconds, but i dont know what to do in order to make the length of the freeze longer on diffrent leves, sure i make another trigger with a longer wait period before pause and unpause, but how can i make sure it wont mix with the other 2 triggers? I tried many times to find the right condition for the job but i failed

 

[Ramza]

U must make 1 trigger

Event: Unit begins casting an ability
Conditions: spell = time stop
Actions:
If: Integer - level of ability for unit
Then: ..........
Else: Do Nothing

and repeat this for how many lvls u have