Immolation/negative aura questions

[Bonzo]

I have two different questions which arent related to each other:

1. I want a unit to lose all its mana by activating a spell and to regain the mana it had after deactivating it. I based the ability on immolation.
So I want to run a trigger when the unit starts the immolation and a second trigger when the unit ends the spell. Which events and condition do I use to detect each event? When anyone has a solution without using immolation I'd take it, too.

2. I've read threads about disable mana/health-regeneration. In many cases it was suggested to use auras with negative amounts. When I try to set it into negative (Brilliance Aura e.g.) it always ends up at 0. I even checked and unchecked the percentage box with no success. What am I doing wrong?

Greets Bonzo

 

[Flare]

Unit is issued an order with no target

Issued order equal to immolation (for activating)/unimmolation (for deactivating)

Hold shift when double-clicking the field. That normally allows you to bypass most Object Editor limitations.

 

[Bonzo]

Thanks, Flare, for the fast answer.
Both your answers hit the mark and have helped me a lot.