decrease unit mana by action?

[xokelat]

have anyone played raijin in dota? well if you dont, his skill is travelling to targeted area by lightning speed. It cost no mana, but after the unit reach the targeted area, his mana will be decreased as far as his distance. So the mana will be decrease bases on how far he travelled

can i decrease unit mana by action trigger? if can, tell me how to to that..
thanks b4

 

[kleinerhauck]

Use the ability 'Item Mana Bonus'
Set 2 levels. Set mana bonus on level 1 to 1, on level 2 to 0.

Then via triggers:
Add the ability
Set level of ability to 2
Remove the ability

Then the unit has permanently +1 mana.

To make this more efficient create spells with +1, +2, +4 etc..

 

[WaterKnight]

Was probably referring to the current mana.

Action Unit - Set Mana in conjunction with (real) function Unit - Property (to get the current amount)

 

[defskull]

For clearer view, here is it:

• Unit - Set mana of (Triggering unit) to ((Mana of (Triggering unit)) - (Distance x ConstantValueForDecreasingMana))

Something like that, the formula is just CurrentMana - ManaUsed = SetCurrentManaOfUnit

You should see a function that "Reduce Mana of Unit" but instead, Blizzard provide "Set Mana of Unit" where you can set it by using your own formula, equal to "Reduce Mana of Unit" function

Just, math.