PerkVerified on build 25910882Known authorLanguageEnglishDeutschEspañolFrançais日本語한국어PolskiPortuguês (BR)РусскийTürkçe简体中文OverviewForKeeperMastery bonus4Game IDperk_known_authorEffect on crafts+4 mastery on 0 crafts.Raw game dataAs stored in the game's GameBalancecraftMastery4