Get Spell?

Get Spell?

What should I use to make hero get spell in his spell book,when buy specific item from the shop?

event:
unit aquires an item
action:
if item type of (manipulated item) is equal to "Item"
add "Ability" to (triggering unit)

something like that.
if you have more items like that, just copy the if, and change the ItemYouWant and Ability.

Thanks ,but I meaned the spell should be added to other learnable spells,not already leared ones.Sry if I said something else.

Edit:

I found it.
Action-Hero Learn Skill.