How to Change a unit to a stronger unit when it reaches level 10

[Clive]

What i want to do is to make it so once my captain reaches level 10 to turn into a knight's model starting back at lvl one except he will be stronger (Chaos Dmg) and have more abilties.

The problem is that I don't know how to do this "transformation"
I think theres two ways either a trigger or just an abilty that he learns at lvl 10 and I dont want it like a druid of the claw that can morph into a bear and then can morph back into the druid the ability has to be hero compatible too.

thanks

 

[Darthfett]

Just make a dummy ability and add one of these triggers.
The first one is if you just want it to make it stronger when it reaches level 10.
The second one is to make it stronger when you gain the level 10 skill.

Stronger Unit
    Events
        Unit - A unit Gains a level
    Conditions
        (Unit-type of (Leveling Hero)) Equal to Captain
    Actions
        Unit - Replace (Leveling Hero) with a Knight using The old unit's relative life and mana

Stronger Unit Ability
    Events
        Unit - A unit Learns a skill
    Conditions
        (Hero level of (Learning Hero)) Equal to 10
        (Unit-type of (Learning Hero)) Equal to Captain
    Actions
        Unit - Replace (Leveling Hero) with a Knight using The old unit's relative life and mana