How to make an item and buff that reduce mana cost of all abilities

[HolyWillRise]

Item and buff that reduce mana cost of all spells by 20% i saw that in 1 map called heroic town.

 

[Warseeker]

• Reduce Cooldown
  • Events
    • Unit - A unit Acquires an item
  • Conditions
    • (Item-type of (Item being manipulated)) Equal to Crown of Kings +5
  • Actions
    • Trigger - Turn off (This trigger)
    • For each (Integer A) from 1 to 3, do (Unit - For Unit (Triggering unit), Set mana cost of ability Flame Strike, Level: (Integer A) to 30)
    • For each (Integer A) from 1 to 3, do (Unit - For Unit (Triggering unit), Set mana cost of ability Banish, Level: (Integer A) to 30)
    • For each (Integer A) from 1 to 3, do (Unit - For Unit (Triggering unit), Set mana cost of ability Siphon Mana, Level: (Integer A) to 30)
    • Unit - For Unit (Triggering unit), Set mana cost of ability Phoenix, Level: 1 to 30
    • Trigger - Turn on Increase Cooldown <gen>

• Increase Cooldown
  • Events
    • Unit - A unit Loses an item
  • Conditions
    • (Item-type of (Item being manipulated)) Equal to Crown of Kings +5
  • Actions
    • Trigger - Turn off (This trigger)
    • For each (Integer A) from 1 to 3, do (Unit - For Unit (Triggering unit), Set mana cost of ability Flame Strike, Level: (Integer A) to 75)
    • For each (Integer A) from 1 to 3, do (Unit - For Unit (Triggering unit), Set mana cost of ability Banish, Level: (Integer A) to 75)
    • For each (Integer A) from 1 to 3, do (Unit - For Unit (Triggering unit), Set mana cost of ability Siphon Mana, Level: (Integer A) to 75)
    • Unit - For Unit (Triggering unit), Set mana cost of ability Phoenix, Level: 1 to 75
    • Trigger - Turn on Reduce Cooldown <gen>

For buffs, it's the same thing, you just need to detect when a unit has a specific buff.

 

[Uncle]

I think the indexes start at 0 for that function. So you'll be setting it for level 2, 3, and 4 but not 1.