I found something cool out, by making custom item abilites, and then changing them into normal abilties, (all you need to do is unit - add ability (edited item ability) and it works like a tome for a normal unit, you can add things like permanent life and mana gain and also attack and defense bonuses. Any way I thought it was awesome, being about to add bonuses to units on the fly and not using upgrades for it. | 
