How do I make units that level/hero skills?

[Flak Maniak]

Exactly as the title says. I'd like to make an AoS in StarCraft 2, and the editor is, quite frankly, a little less scrutable than I'd like. I know there are trigger events for units gaining experience or levels, but I don't know how to make units actually trigger those. In the same vein but moreso, I'ven't the faintest how to make hero skills. Well okay, I know how to make abilities, the question is just how to make learned hero abilities specifically.

[Fledermaus]

http://www.sc2c.org/showthread.php?t=12 or http://starcraft.incgamers.com/forums/s ... hp?p=31756

[Flak Maniak]

Alright, so I've got a unit that levels up. I tried to add Psi Storm, adding the button on its command card, adding the ability, and doing everything else I could think of to make it show up, but still, the ability didn't show up. I'm stumped.