Rashek's Immortality

[Spoolofwhool]

9 hours ago, Child of Hodor said:

Brandon has confirmed it was getting harder to maintain the same level of youth and that it could only work for so long.

Yes, but once the Well refilled he could've used the power to reshape his body, either undo the age of a millennia or possibly even make himself unaging so he would've no longer have needed to rely on the atium trick to sustain himself.