User blog comment:Fairingrey/May 3, 2015 Thoughts About Quitting and Where Ishtaria Is Heading/@comment-11188061-20150505060032/@comment-11188061-20150505111440

Oh, thanks for the information. I'm really too lazy to figure out how much SP you regen in Castle especially since my line isn't always clear, so good to know, and good to figure out that the answer's around 700K.

Still, that is a tough number to overcome.