There is nothing in dark forest yet maybe they'll add something in the upcoming updates, the story stops after you deliver the blue root to Jane

Drink the speed potion and you can avoid him by speed or you can do that without drinking the speed potion as he is very slow but I don't know if you can knock him out with a spell or not as I tried everything except the phoenix spell which I don't have yet, after delivering the blue root the story stops until the upcoming update, hope it helps

Defeat the wizard's daughter in chess and you'll have 4000 for every win, she uses the same tricks again and again so it's not that hard

You have to complete the saving the wizard mission then you'll receive the letter