if you didn't already know this if you and or your party is running low on health /mp and you have a clerk, priest or bishop with you tell them to heal you and this only works with magicians. you use magic guard and get the clerk priest or bishop to heal you again. if you in an all magicians party and your in a pq it is very helpful

magic guard?
hello....that power doesnt heal!!!!
it just imporves ur powers

and I have a lvl 200 mage

I doubt you're a level 200 mage. Even a level 20 mage knows what magic guard does, and it does not improve your power.
Magic guard temporarily replaces damage with MP instead of HP.

So with maximum magic guard when you get hit, 80% of the damage is taken out of your MP bar instead of HP bar; the other 20% is taken out of your HP.