The Tainted Child quest is an Epic Branching Quest.

Collect the quest from Pyotr Kaminksy in Altdorf 25,17 during the Feast of Shoika Live Event.

Speak with Erich Weisseklaue 12, 38
Travel to Nordland
Participate in the Pillager's Approach PQ
Report to Kristof Bruener at 32, 18

CAUTION: AFTER COMPLETING THIS QUEST YOU WILL BE GIVEN A CHOICE OF TWO QUESTS. ONE IS A PVP-FOCUSED ROUTE, THE OTHER IS PVE-FOCUSED. YOU CAN ONLY CHOOSE ONE PATH. THE PVP ROUTE MAY BE FASTER BUT DOES NOT OFFER UNIQUE REWARDS.

The Tainted Child - Path of Sweat (PVE)

Kill Gustav the Tainted at 31, 41
Report to Captain Kleinke 55, 57.5
Travel to Troll Country and seek out Baba Kartoflana

[incomplete]

The Tainted Child - Path of Sweat (PVP)

[incomplete]