|Reach zone 100 for the first time|
|Reward||Mega books now give 60% instead of 50%.|
|Goal||Complete Dimension of Anger|
|Equipment prestige upgrades don't drop (not even from Scientist II).|
|Tier I Equipment is cheaper|
"Bring yourself to a dimension where Equipment is cheap but unable to be prestiged, in order to teach yourself better resource and equipment management. Completing 'Dimension of Anger' (20) with this challenge active will return missing books to maps, and your new skills in Frugality will permanently cause MegaBooks to increase gather speed by 60% instead of 50%. Loot rewards will be increased by the same amount per level."
Completing the challenge will allow the player to collect equipment prestige upgrades from maps again.
Equipment costs for this challenge = Base*1.1^level, as opposed to the 1.2^level usually used.
Here's a table showing the difference in effect of mega books after completing Frugal from zone 60 upwards on select zones:
|Zone||Increase in resources gained|
The result of the following formula is the final multiplier of resources gained effectively given by Frugal at any given zone (assuming the mega books from that particular zone were purchased). Simply multiply your current resource gain by this number to see what your resource production would have been with Frugal:
(1.6 / 1.5) ^ ([Current zone] - 59))