http://eq2.wikia.com/wiki/Mission_Improbable...
Third/last quest in line is repeatable but its not marked as such. It gives 6 pct aa each time at level 80.
The quest is auto given when zone into the icy keep instance in frostfell.Can be done solo in bout 15 mins or can grp up and do the heroric one prob faster.There is no lock outs or timers and a new instance respawns as soon as you leave the zone.
Part 2 of this is money maker.Depending on speed you can make 2+ pp a hour by doin this repeatable quest and buying gear from the merchant with the tokens you get as a reward from quest and from killing some named.The gear of all types is purchased in the frostfell zone from the merchant next to the goblin that gave you the 2nd quest n the series.After buy the gear you can zone out of the zone and sell to normal city merchant for 20+ gp a pop i was makeing bout 3.5 pp a hour....enjoy.