Willpower ability affects saving throws against the following magical and mental status effects: 
CharmedTurnover to opponent's side
Removed by:
Purifying Fire , 
Cursed-30% Chance to Hit , 
FearRun away in fear , 
Frozen-20% Water Resistance
+40% Fire Resistance
+65 Armour
Cannot Move or Act
Removed by: Purifying Fire
Burning , 
MuteCannot use Spells or Scrolls
Removed by:
Cleansing Water
Doctor , 
PetrifiedCannot Move or Act
Removed by: Purifying Fire
Remove Petrification , 
Slowed-64 Movement
-4 Starting AP
-4 Maximum AP
-4 Recovery AP
Removed by:
Hasted and 
StunnedCannot Move or Act .
Each time one of these effects is about to affect the character, a w100 is rolled. Each point in Willpower counts as +10 to the characters roll.
Example: Madora is about to get frozen. The Number to beat (calculated from the Intelligence of the caster) in this case is 100.
- 0 Points in Willpower: Madora cannot resist being frozen
- 1 Point in Willpower: Madora has to roll above 90
- 2 Points in Willpower: Madora has to roll above 80
- 3 Points in Willpower: Madora has to roll above 70
- 4 Points in Willpower: Madora has to roll above 60
- 5 Points in Willpower: Madora has to roll above 50