Two problems

[Crusher]

First one:

How can I set that Immolation works when your hero is invisible? I mean, I activate Immolation, then turn wind walk, but the immolation doesn't work in it.

Second one:
How to display that triggering player is out of region <boss>. It's used to display that you're too far away from that region to attack, but you must be inside if you want that.

 

[BlackRose]

1. Trigger the entire spell? I don't know, try searching Gameplay Constants.
2. Wut? If region contans unit, I'm sure there is a boolean for that.

 

[Crusher]

1) Tried and failed.
2) I had a boolean trigger, but it kept spamming the whole text over and over when you're in that region.

 

[Silver]

2) You could turn off the trigger and turn it on again after a few seconds so it doesn't spam.
1) Triggering it should work (did sorta the same thing before). Basically, if the unit activates immolation you set a boolean variable to true. Then have a different trigger check if the unit gets the invisibility buff (in this case wind walk I guess). When they do, add a custom permanent immolation ability to it (which subtracts mana over time). Have yet another trigger check if mana is 0, and remove the permanent immolation. Also have a trigger check if the wind walk buff is gone, and remove the permanent immolation. If the unit has mana left, activate immolation, otherwise keep it off.
( Not sure if it works, as I did mine with Invisibility ( sorceress ) )

 

[BlackRose]

It would help to post triggers, how did you try to make Immolation and the trigger of the boolean thingy.

 

[Manix]

1) You can actually use

Animation - Change Unit's vertex coloring to (100.00%, 100.00%, 100.00%) with 100.00% transparency

But there's still gonna be a shadow, if that's a problem for you you can do this:

Make a duplicate unit of your hero/unit with no shadow, then metamorph in it and do the Animation - Change Unit's vertex coloring to (100.00%, 100.00%, 100.00%) with 100.00% transparency

You can actually set the model to None or whatever, also make the unit invulnerable ... Idk it's just a bunch of ideas

 

[Silver]

But there's still gonna be a shadow, if that's a problem for you you can do this:

Make a duplicate unit of your hero/unit with no shadow, then metamorph in it and do the Animation - Change Unit's vertex coloring to (100.00%, 100.00%, 100.00%) with 100.00% transparency

You can actually set the model to None or whatever, also make the unit invulnerable ... Idk it's just a bunch of ideas

But computers will still see you...

 

[Rainther]

1) You can actually use

Animation - Change Unit's vertex coloring to (100.00%, 100.00%, 100.00%) with 100.00% transparency

But there's still gonna be a shadow, if that's a problem for you you can do this:

Make a duplicate unit of your hero/unit with no shadow, then metamorph in it and do the Animation - Change Unit's vertex coloring to (100.00%, 100.00%, 100.00%) with 100.00% transparency

You can actually set the model to None or whatever, also make the unit invulnerable ... Idk it's just a bunch of ideas

From what I see this is extremly irrelevant. Or are you trying to make a customized spell and hold your thumbs on it working as simple as that?
EDIT: Missread your post. I now understand what you were getting at, but it's not a solid solution.

And second thingie, if you wish to redo Dota's Roshan trigger the event should be attack and see if the attacker is in region.

 

[War3shade]

For the immolation think, try Gameplay constants -> Invisible unit bestow aura (throught immolation is an aura)

 

[Moridin]

For immolation with wind walk, I would suggest a dummy unit that has immolation and you having wind walk.