Those are custom variables.
(Variables can be opened by pressing a golden X button at the top of the screen or by pressing the hotkey combination "ctrl - B")
I can definately tell you that you are new to WC3 modding and suggest you to take it not too fast. Try learning the basics of how the trigger editor works and how you can combine it with the object/terrain editor.
After that, you should learn about spell-effects or simple spells like this one.
As a suggestion for this spell.
You can add an invisible ability based of evasion to the casting unit.
Then wait a ... duration. (you can use either Wait(gametime) or you can do it with timers (which are a little bit more accurate)
Timers are for you a bit too much I think and noone will notice the difference in game
Then remove the ability and the buff.
@Mythic Yea I suggest him to use Wait(gametime) even though we have a kinda big discussion about how to avoid that
The ability you use could be based of Berserk and set the duration to 0 (infinite) and the other effects to 0 as well to remove any unwanted effects.
For the Evasion ability. Make a spell book and add he evasion to that book.
In the map initialization (trigger), disable the spell book for every player.
When you add evasion to a unit, add this spell book instead. This will make that ability invisible.
