- "Rune. Place in an empty socket on a sword. Goes wonderfully with the Tvarog runestone."
- —In-game description
One Pyerog runestone is used in the creation of the Dumplings runeword which, when in effect, causes any food consumed to regenerate 100% more vitality (i.e. doubling the amount of health regenerated).
Despite the in-game description urging players to put this rune on a sword, doing so doesn't actually confer any effects. In fact, placing this runestone on a sword raises the sword's level requirement by 1, and is thus not recommended.
- This runestone references the Eastern European dish pierogi, which are filled dumplings created with unleavened dough and prepared either by boiling or baking.
- This runestone has no effect when placed in an upgrade slot, and raises the weapon's level requirement by 1.
- In the crafting menu, this runestone's weight is listed as 0.01 when it is actually 0.03.