Reducing Ability Cooldown Skill

[theDTD]

*i want to make this skill (passive)
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*(hero) has the abilities (stormbolt) and (ulti)
*when (hero) learns (ulti),
:level 1: cooldown for (stormbolt) is reduced by 25%
:level 2: by 50%
:level 3: by 75%

 

[Joccaren]

Create three abilities that are the same except for the cooldown. Make the abilities 'Level one stormbolt' 'Level two Stormbolt' and 'Level three stormbolt' (If you need help understanding what I'm talking about then just look and the demolish ability in the OE) then set the cooldowns on each level of your ability to what you want the cooldown to be set to when the player learns each level of your passive ability. Then, for your passive ability, create an ability based of engineering upgrade and just edit the spells.