The target is a giant, I'm not sure if dispel magic actually falls under a mental attack but I've noticed that with my 9 art necromancer that this spell is incredibly difficult to land on anything.  Even things with 0 saves I just can't get it to work at all.  Is it supposed to be this hard to land a spell?
Code:
Health 100 Mana  81 Movement  92 
c sleep vezu
You start to concentrate.
Health 100 Mana  81 Movement  92 
You utter the words, 'grzzs'.
Vezu the healer goes to sleep.
Health 100 Mana  77 Movement  92 
leech vezu
You start to concentrate.
Health 100 Mana  77 Movement  92 
leech vezu
You utter the words, 'waia rzzqp'.
You drain some of Vezu the healer's magical energy!
Health 100 Mana  90 Movement  92 
You start to concentrate.
Health 100 Mana  90 Movement  92 
You utter the words, 'waia rzzqp'.
You drain some of Vezu the healer's magical energy!
Health 100 Mana 104 Movement  92 
c dispel vezu
You start to concentrate.
Health 100 Mana 104 Movement  92 
You utter the words, 'eugszr waouq'.
You fail to break any spells.
Health 100 Mana  98 Movement  92 
c dispel vezu
You start to concentrate.
Health 100 Mana  98 Movement  92 
A strange compulsion keeps you from attacking Vezu the healer.
Health 100 Mana  98 Movement  92 
c dispel vezu
You start to concentrate.
Health 100 Mana  98 Movement  92 
You utter the words, 'eugszr waouq'.
You fail to break any spells.
Health 100 Mana  93 Movement  92 
c dispel vezu
You start to concentrate.
Health 100 Mana  91 Movement 100 
You utter the words, 'eugszr waouq'.
Health 100 Mana  86 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  86 Movement 100 
You utter the words, 'eugszr waouq'.
You fail to break any spells.
Health 100 Mana  81 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  81 Movement 100 
You utter the words, 'eugszr waouq'.
You fail to break any spells.
Health 100 Mana  75 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  75 Movement 100 
You utter the words, 'eugszr waouq'.
You fail to break any spells.
Health 100 Mana  70 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  70 Movement 100 
You utter the words, 'eugszr waouq'.
Health 100 Mana  65 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  65 Movement 100 
You utter the words, 'eugszr waouq'.
Health 100 Mana  60 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  60 Movement 100 
You utter the words, 'eugszr waouq'.
Health 100 Mana  55 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  55 Movement 100 
You utter the words, 'eugszr waouq'.
Health 100 Mana  50 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  50 Movement 100 
You utter the words, 'eugszr waouq'.
Health 100 Mana  45 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  45 Movement 100 
You utter the words, 'eugszr waouq'.
You fail to break any spells.
Health 100 Mana  39 Movement 100 
c dispel vezu
You start to concentrate.
Health 100 Mana  39 Movement 100 
leech vezu
leech vezu
You utter the words, 'eugszr waouq'.
Vezu the healer's ward of sanctuary vanishes.