[Spell] Is it possible that Vampiric Potion is casted by Unit Target?

[fanofdiy]

As we all know, Vampiric Potion is an item ability and it is used with no target.
I wanna use it as a hero ability (but only can be cast on heroes) and make it unit-targeted like Frost Armor.
How to do this?

 

[Nichilus]

You can't. An instant self-cast ability cannot be remade into target cast ability.
But considering that the Vampiric Potion just heals the unit for % of damage done, you can trigger it quite easily if you are on 1.35 version:

• Create ability based off some existing auto-cast ability. You can for example take Inner Fire, but just remove any positive effects it has.
• Create a custom buff that your new ability will apply

In triggers:

• There's an event for detecting when unit takes damage
• You can check in condition if the (Damage source) has the custom buff you created
• If it has the buff, you can access the amount of damage dealt and heal the (Damage source) for a percentage of it

On older versions you would probably need to import damage detection system into your map to detect when unit took damage

 

[nchp1903]

There's a really stupid workaround without using DDS, like this:

• Make an ability based off Inventory(Hero), but with 0 Item Capacity. If you can't input 0, just use Shift-Enter.
• Give the Vampiric Potion ability to a custom powerup item (based off a rune/tome).
• Make a trigger like this:

• Events
  • Unit - A unit Starts the effect of an ability
• Conditions
  • (Ability being cast) Equal to Your Ability
• Actions
  • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
    • If - Conditions
      • (Level of Inventory (Hero) for (Target unit of ability being cast)) Greater than 0
    • Then - Actions
      • -------- If the target already has Inventory (Hero), then no need to add/remove Inventory (Hero 0 Slot) in case of weird bugs. --------
      • Hero - Create Rune of Vamp and give it to (Target unit of ability being cast)
    • Else - Actions
      • Unit - Add Inventory (Hero 0 Slot) to (Target unit of ability being cast)
      • Hero - Create Rune of Vamp and give it to (Target unit of ability being cast)
      • Unit - Remove Inventory (Hero 0 Slot) from (Target unit of ability being cast)

Disclaimer:

• Doesn't work very well, and by that, I mean doesn't work at all, with units who already have Unit Inventory.
• The powerup sometimes appears briefly before being given to the unit. Just replace its model with a blank one to circumvent it.
• The item pickup thingy will appear near the unit's feet briefly. If you want to be thorough, just replace Objects\Spawnmodels\Other\ToonBoom\ToonBoom.mdl with a blank model. Although, I don't recommend it.

 

[Uncle]

Why not just add the Item Life Steal ability to the target? It's passive and can be hidden away.

In here I have it setup so that the Hero is using a new version of Bloodlust with it's own unique buff:

• Cast
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
    • (Ability being cast) Equal to Bloodlust
    • (Level of Item Life Steal for (Target unit of ability being cast)) Equal to 0
  • Actions
    • Unit - Add Item Life Steal to (Target unit of ability being cast)
    • Unit Group - Add (Target unit of ability being cast) to VampiricGroup
    • Set VariableSet VampiricCount = (VampiricCount + 1)
    • Trigger - Turn on Loop <gen>

• Loop
  • Events
    • Time - Every 0.10 seconds of game time
  • Conditions
  • Actions
    • Unit Group - Pick every unit in VampiricGroup and do (Actions)
      • Loop - Actions
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • ((Picked unit) has buff Bloodlust) Equal to False
          • Then - Actions
            • Unit - Remove Item Life Steal from (Picked unit)
            • Unit Group - Remove (Picked unit) from VampiricGroup.
            • Set VariableSet VampiricCount = (VampiricCount - 1)
            • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
              • If - Conditions
                • VampiricCount Equal to 0
              • Then - Actions
                • Trigger - Turn off (This trigger)
              • Else - Actions
          • Else - Actions

You can hide the Life Steal ability by setting it's Art Button Positions to 0, -11. Or just use the Hide ability Action to do so.

Also, make sure the Loop trigger is Initially OFF.

 

[nchp1903]

Item Life Steal is a very good ability, but it is an Orb ability, which may interfere with other Arrow/Orb abilities if target already has one.

Then again, it depends on what OP wants.

 

[fanofdiy]

I've found that it causes some bugs which may be difficult to fix, So I quit.
But thank you all for helping me.