Damage to unit skill

Level 2
Apr 7, 2013
I wonder if there is a way to make this kind of skill. For me first skill. I want to make a skill that will give the the user bonus attack damage(the base damage)againt a type of unit. For a example. I want a preist to have bonus damage against a ghoul. If the priest have lets say 10 base damage to all units i want this skill to add in like 5 extra damage for when he attacks the ghoul.

For my second skill. I also want a same kind of skill but instead of just adding extra damage to that one unit i want it for the target race. Example. Preist have bonus damage aginst the undead race

Im sorry for my bad english. I hope i was clear.enough about what i want