[Trigger] Removing then adding ability GUI

[ItachiTraitor]

Needing help with a trigger, im basically needing a trigger that when you cast metamorphisis it'll remove a ability and replace it with another ability, then after metamorphisis is over, relearn the regular ability that you lost with the skill points already in and remove the metamorphisis ability you got from it. 2 Pictures to show. Please and Thank you!! http://img197.imageshack.us/gal.php?g=trigger.png

 

[Maker]

Make your metamorphosis so that is does nothing.

Then detect with a trigger when your hero finishes casting the ability. Hide the hero, and instantly move and unhide your metamorphed hero unit to the same place where your original hero was. Store the different skill levels into a variable.

So basically create two heroes, one normal and the other one is the metamorphed.

Your images are not good, fix them.