Garthanos
Arcadian Knight
Nothing necessarily needs to be fluffless exactly just distinctly written.So applying that to RPGs, including the math, the actual formulae on how to replicate the charts would open things up to use and replication. Presenting the mechanical pieces as distinct, fluffless units of mechanics would make them more portable and less likely to infringe.
Edge is a situational dramatic benefit not always about combat. But it comes shining to the forefront when opposed forces are arrayed. In combat one or another side is always seeking an edge over their adversaries or to cancel the edge their enemy may have gained. When you have the edge you can roll twice and take the better instead of once to determine success of your action. Similarly if the subject of an action has an edge against that action (sometimes referred to as having a defensive edge) this may force the action which they oppose to roll twice and accept the lesser roll or cancel any edge the other may have gained. Once you have lost your edge you cannot recover it for/or against a particular action though other (usually lesser) modifiers may also affect success.
Someone else might word it better... I am probably missing something or making it complex in some way but that is my on the fly.
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