Flamme's Hindsight:

Name: Flamme's Hindsight
Complexity: Very Hard
Cast Time: Instant
Initial Cost: 4
Upkeep Cost:
Usable By: Either
Hidden: False
Effect:
If successful, reroll a failed check involving a d20. If the original roll was a natural one, double the initial cost. If cast by nation magic, suffer -2 temporary karma for every 1 the caster misses the DC, in either directions. If cast by character magic, caster suffers a 10% chance to reduce their magic attribute for every 1 the caster misses the DC, in either directions. If the above downsides are mitigated in any sense, increase the base cost and complexity by 2.
Creator: Unknown