[@Shoryu Magami]

 I think the majority of dueling here is done freeform for lack of a better term. Unfortunately, in my experience it turns into a constant pissing match of DBZ proportions where even a world ending spirit bomb leaves the opponent still able to function on some level. Which is what I am trying to avoid. I want to see a bit of realism in my battles. For example, in a battle I had previously someone was fighting in a swampy terrain with essentially giant metal claws attached to their feet but it rarely weighed them down or caused them to sink. This is a bit strange, really. 

 On any accord, yes, feel free to do some research if you'd like. You can find a pdf version of the 3.5 D&D Player Handbook if google it. But essentially, it is played on a d20 scale for most except for damage which is typically a d8 or d6. If you have more specific questions I can try to answer them - otherwise let me know in the future if you are interested.