Quote:
Originally Posted by Daigoro
The -1 roll would have to occur randomly or unpredictably so that the player wouldn't just burn it on dud or easy shots.
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Per the text, the -1 occurs at the GM's choice, not the player's.
If you find the mechanic balanced, there's no reason to have a "once per" limit. Players just use the ability at will, generating that many more penalty points for the GM. Obviously there's more plusses than minuses in the system -- but then, many games are skewed so the heroes can be heroes, with many a version of some sort of hero point system.
The black and white discs from Othello are pretty handy for tracking "karma" style resources where using one gives a point to the opposition. Just flip them over when they're used; add and subtract to the total pool if that changes. If you have a per-session or per-combat limit, that's the pool size in this case. Start them off white for the PC; flip them to black for the GM when the PC spends a point; the GM just removes a black one when he spends his points, and when you're done, you're done.