Profane Runestone, Rank 5

Low-rank 1-5 Profane Runestone can be purchased within the Sage's Shop from Bradda the Sage.

Mid-rank 6-10 Profane Runestone can be dropped from Lockboxes. (depends on lockbox release)

Zen Market Companion Upgrade Bundle can give you Profane's.

Неосвященный рунный камень 5-го уровня