I'm training a new character, started at 30 magery and got it to 40.2 at the moment. I'm casting Bless on myself - the spell hasn't successfully cast yet, keep getting 'The spell fizzles.' above my characters head, and no icon appears in the buff / debuff bar. However, I keep running out of mana. Sometimes, it takes 6 mana, but not everytime. I thought spells only cost mana on a successful cast? I've never noticed losing mana on failed casts before.