If at any point your alignment changes to non-lawful, certain of your monk abilities will cease to function.

High Attack Bounus  Starting at Level 12, Their attack bonus changes from Medium to High. I.e. A level 30 monk now has +27 base attack bonus.

Shattering Blows

A monk ready to strike, style unbreakable, no father too his style.

At level 12 the Monk Gets Shattering Blows, upon landing two consecutive hits, They Strip their foes of their Resistances, leaving them Vulnerable too The Monk's Devastating Fists attack. A passive ability which strips the target from physical Damage Reduction for 3 rounds (can be re-applied), if two attacks during one round successfully hit. Must be wearing gauntlets for this to work.

Meditative Strikes

Staring in the Epic Levels, a Level 20 Monk Qualifies for Meditative Strikes, knowing where to strike to inflict the most damage, they add their Wisdom Modifier as Magical Damage to their Attacks with both fists and weapons.

Unarmed Damage Progression:

Level Small Medium Large Huge
1 1d4 1d6 1d8 1d6**
4 1d6 1d8 2d6 1d8**
8 1d8 1d10 2d8 1d10**
12 1d10 2d6 3d6 2d6**
16 2d6 2d8 3d8 2d8**
20 2d8 2d10 4d8 2d10**
24 2d10 3d8 6d6 3d8**
28 3d8 3d10 6d8* 3d10**

Large Races are these.

*only Half-Ogre can reach this value.

** hardcoded. Huge monks were never imaginated I guess.