Moon Glaive Attack (hero+different level)

Hallo guys, I need some help. I want to create a passiv skill seeing at the titel but i haven't find a good guide for them. Please could someone me?
Thanks for trying.

The moon glaive ability actually just displays an icon. The effect of that upgrade is caused by the upgrade itself, any unit with a bounce attack can have it's number of bounces affected by an upgrade.

Thx for your fast answer, but i wanted to know how i can creat the effect with different levels. And i could solute my problem by myself!

level up upgrade with hero skill to keep level same.

note: you cant undo upgrades, soo forget about multiple heroes per player and skill reseting.

Why not different upgrade for different hero?

That's only worthwhile if the map only allow players to have one of each hero, and each hero that utilizes a bouncing attack passive also has his/her own bouncing attack upgrade.

MercyfulJester

try to do this
post result
your are our last hope

Just like Dota. A dummy skill and a real upgrade.
Make sure your hero's attack type is Missile(bounce)
Make a copy of Moon Glaive upgrade and make a dummy hero passive skill.
When hero learn the passive skill, use trigger to set the upgrade level to the skill's level.