Piety and Sin

After reading this post here: http://jrients.blogspot.com/2010/11/sin-and-sin-points-draft.html couldn't help but whip this up from a few ideas I've had in the past.

Piety is how devout one is to the divine and the tenets of their faith. Everyone has to roll this score, there are no atheists in worlds where gods walk the land. Those with clerical powers must maintain a piety score of 7 or more to use clerical abilities.


Piety
Score....Healing.....Denial......Failure.......Intervention
3............ -5............ 20% ........... x......1 in 1000000
4............ -4............ 15%............ x ...... 1 in 100000
5............ -3 ............ 15%............ x ...... 1 in 100000
6............ -2............ 10%............ x ...... 1 in 10000
7............ -1............ 10% .......... +30 .....1 in 10000
8............ -1 ............ 5% .......... +20 ...... 1 in 10000
9 ............ - ............ 5% ............ +15 ...... 1 in 1000
10............ - ............ 3%............ +10 ...... 2 in 1000
11............ - ............ 2% ............ +5 ...... 3 in 1000
12 ............ - ............ 1%............ +5 ...... 4 in 1000
13 ............ - ............ -............ - ...... 5 in 1000
14............ - ............ - ............ - ...... 6 in 1000
15............ - ............ - ............ - ...... 7 in 1000
16 ............ - ............ - ............ -5 ...... 8 in 1000
17............ - ............- ............ -5 ...... 9 in 1000
18............ - ............ - ............ -10 ...... 10 in 1000

Healing: This score is applied as a penalty per level/HD vs beneficial healing spells. EX: a 2nd level character with a Healing mod of -1 receiving a casting of a healing spell that would normally restore 7 hp will only have 5 hp restored.

Denial: this is the chance that a beneficial clerical spell cast on an individual will simply not function. The Ref is could choose to ignore this for spells cast at holy sites and when one is directly serving the faith.

Failure: this is the modifier to the chance of a cleric being able to cast a clerical spell.

Intervention: chance for a call for divine intervention to be answered. If intervention is denied a check vs piety must be made or a point of Sin is gained. Calling for intervention more then once per character level simply will not function and will earn a character another point of sin.

Sin:
This is a measure of how one has sinned against their faith. A running tally is kept.
Each time sin increases the character must check against Piety.
The check against piety is made by rolling 1d20+SIN vs Piety. If the roll exceeds the current piety score the character loses a point of piety.

Removing Sin:
Prayer, sacrifice and absolution will reduce a character's sin score.
A simple act of observance reduces sin by 1point (1 hour &10 g.p / level)
A lesser act of observance reduces sin by 1d4 points (4 hours & 25 gp/level)
a greater act of observance reduces sin by 1d8 points (1 day & 100 gp/level)
A major act of observance reduces sin by 1d12 points (1 week & 250 gp/level)

if sin it reduced beneath a score of 4 the character is allowed a roll of 1d20. if this roll exceeds the characters current piety score they gain a point of piety.

Reveling in sin.
Check Jreints here if one wants this option to gain experience and put gaining of sin directly in the players hands.