Costs Fatigue, Extended is a a non-canon idea for varying the "2 FP to activate abilities for 1st minute, 1 FP to maintain ability for each additional minute" policy of Costs Fatigue 2 -20%.
It is based on changing Costs Fatigue use periods from 1 minute to longer periods, the same way Trigger is done with Trigger, Extended.
For example if it is 1/2 discount value to change 1m to 10m then for -10%, the first 2 FP should activate it for a full 10 minutes, and then each extra FP for 10m periods.
This ends up being a better deal than Costs Fatigue 1 (1 FP per minute) for the same cost.
Or by comparison: Costs Fatigue 4, Extended (4 FP for ten, 2 FP for ten) being worth -20% compared to CF2 (2 FP for 1, 1 fp per 1) the only downside is the higher activation cost when using for shorter periods.
That's probably okay because many consider that limitation to be severely overpriced. Tycio (talk) 03:53, 6 March 2021 (UTC)