Item Ability Levels

I've been making a passive ability for a custom hero which involves a spellbook containing two abilities based off of item abilities (stat gain and damage bonus). When I use a trigger to increase the levels of these abilities in the spellbook upon gaining a level in the dummy ability... nothing happens. Are item-originated abilities unable to be levelled up?

Item-originated abilities are able to be leveled up. However, I don't think you should be using a spellbook in this scenario as item abilities aren't able to be seen in the unit's command card I believe. You should be able to just add them or level them up directly on the hero. If you want to have something visible, make an ability based off Moon Glaive or something similar which has no effect and just modify the icon and tooltip.

Ah! Thank you for the information. Not needing a spellbook will simplify this ability a lot.