In our group the Nurgle player tends to sigh heavily when he gets this dial advancement reward as other powers are busy choosing their upgrades etc. It occurs three times on the Nurgle dial (second, sixth and ninth clicks) and while the later two clicks can be some use, most of the time in our games Nurgle just wants to ruin regions quickly to get get his bonus points for Provender of Ruin (extra VPs when regions are ruined.)
These rewards are obviously put there for a reason and I seem to remember the rule book hints that Nurgle doesn't want to ruin regions too quickly, but I can't really see why. Anyone got any good ideas on how best to use this ability?
Incidentally, this game is without a doubt my favourite so far this year. Well done FFG.