In the campaign setting I've been tinkering with recently, I've decided that Chaos will play an important role, being a metaphysical cancer that has not only spawned the demonic realm of the Abyss, but actively works to consume reality itself. Throughout the universe, there are some places where Chaos has worn down the walls of reality to such an extent that a malign radiation seeps through and warps everything that comes into contact with it.
Living things that are exposed briefly to the raw stuff of Chaos may exhibit Minor Chaotic Traits, such as those listed on the table below:
1 +1d4 Hit Dice
2 -1d4 Dice: Creatures whose Hit Dice drop to 0 become Shadows, which is animate Chaos.
3 May only be hit by magical weapons
4 Takes maximum damage from any magical weapons or items specifically aligned with Law
5 May cast darkness (30' radius) at will
6 Gains +1 to hit against Lawful creatures
7 Lawful creatures gain +1 to hit the creature with this trait
8 May cast cause light wounds 1d4 times per day
9 Gains +1 saving throws against spells cast by Lawful creatures
10 Suffers -1 saving throws against spells cast by Lawful creatures
11 Physical appearance changes to that of another creature whose Hit Dice are either higher (1-3) or lower (4-6) than its own.
12 Roll again. If this result comes up a second time, roll on the Major Chaotic Trait table instead.
Coming Up: Major Chaotic Traits