The power pool represents the Priest's ability to call upon the power of his god to perform a miracle. Priests can only do the asking, or grovelling as the case may be, the gods do the rest. If the Priest is not in the god's favor, the spell will be denied. All slots must be multi - ultra slots are not allowed. Mentalism spells do not have Gestures or Incantations, and usually have Invisible Power Effects to all but the Magic sense.
Mentalism spells usually only affect the caster or one target.
A Wizard is a magician who uses the secret words of power to control and shape magic. This is the most basic, and probably the most powerful, of the forms of magic, but it does have one major limitation, True Name Knowledge. All things have a True Name. A pet badger could have a True Name of Eric, but a wild badger would have the same True Name as all other un-Named badgers. The only way to discover a True Name is to have the target or someone else willingly reveal it.