Like I said before, you don't say random words to summon a spell. You solve math problems to summon and fire these spells. If you get the problem right, it hits your opponent and does damage. If you get it wrong, you don't have enough power to guide it and it will miss your opponent.
To get the spells, you have to do jobs for certain people which if you complete all the jobs, you get a Warden Keystone. You can get normal wizard spells when you gain more experience. The more jobs you have to do to get a spell, the more powerful the spell.
The spells are put into elemental groups. Water, Earth, Fire, Ice, and Storm. This is how the spells work.
Fire is powerful against ice and earth.
Ice is powerful against storm.
Earth is powerful against water.
Storm is powerful against water.
Water is powerful against fire.