Making An Aura spawn a unit

Ok, i game my hero TruShot Aura *Ultimate* and i want it when the hero dies, to spawn a Spirit Of Vengeance. Now, dont say use Spawn Hydra, because i want there to be a Passive Button, so how would this be done with triggers?

Use spawn hydra, then use an evasion button, with 0 evade and stuff. The evasion button will show, but will do nothing, while the spawn hydra ability would work the magic.

I'm confused. How would i give the hero that ability once she learns the spawn hydra?

Doesn't the "spawn X" abilties explode the unit when they die? I didn't use it when making a skill for that reason, I found that the units exploded.

Anyways would a simple spawn trigger work for your situation?
Generic unit has <died>
Unit type equal to <MyHero>
Create 1 <MyUnit> at position of <dying unit>

E - Unit learns skill
C - Learned SKill equals to Human - Blizzard
A - Add (Spawn Hydra) to Learning Hero

You might wanna change it into Custom Text and change the 4 unique spell codes, check the Dummy Evasion spell and Hit ALT + D to see the 4 unique alias. Copy it down and type it in the spell by replacing the AHbz with those 4 unique codes, should be A000 if it's the first spell made in the map.

just have it that when a unit learns a skill. Skill learned equal 2 *what your custom spell is based off preferably evasion, then have it add spawn hydra on death.* That work?

No it doesn't =P

I know it because I have hydras in my map and I can animate dead them while there are mini hydras close