[Meglobob]

You can use only 1 gem, NO MORE, to increase level.

You can only use gems = to your magic level, ie...a level 2 mage could use 1 gem to go to level 3 then another gem to reduce the fatigue. Basically any gems used beyond the first just reduce fatigue. You can NEVER raise your mage level by more than 1 through the use of gems, ie a lvl 4 mage could only go to lvl 5, he could however use a further 3 gems to reduce fatigue.

I presume the computer would not cast it because 200 fatigue equals death of mage...