How do you do spells on sword and sandals 3

If youre talking about swords and sandals 3 then you need to go to the little fat boy. You seehim on the top of the tower. He is just on top of the guitarists. You will need enough money to buy a spell. Then you go to your inventory click on your spellbook. Drag the square card on one of the blank sqaures then voila ready to battle. But in order for it to work you will also need enough magica or it wont work it will just stay blanc when you fight.