I made this trigger:

-
Yeo
-
Events
-
Unit - A unit Dies
-
-
Conditions
-
((Killing unit) is A Hero) Equal to True
-
(Unit-type of (Killing unit)) Equal to Yeo
-
-
Actions
-
Hero - Modify Agility of (Killing unit): Add (((500 / 100) x (Level of Experience for (Killing unit))) + 0)
-
-
-
Yeo
-
Events
-
Unit - A unit Dies
-
-
Conditions
-
((Killing unit) is A Hero) Equal to True
-
(Unit-type of (Killing unit)) Equal to Yeo
-
-
Actions
-
Hero - Modify Agility of (Killing unit): Add (((4 / 100) x (Level of Experience for (Killing unit))) + 0)
-
-