"Power is only valuable if it can be harnessed." [Mythos][3.5/PF]

[Lanth Sor]

I have updated the core how it works is you have to make a focus to cast spells the normal way every other class does. The resource instead of spell slot is the same as you mentioned 153 magicka.

Researching a spell or copying it as a ritual allows you to create the spells focus.