You start on taverly and from there you need go west to a nest. Bring some food, the bird there hits 18's if you fail on answers.
Make an insane history (only that ones likes the giant bird) Return to Sylas and give to him the giant bird's feather.
He will want now a helmet of a dwarf. Go south of mind temple. Climb the wall and speak throught the drain pipe with the dwarf. Talk with the princess for persuade let free the dwarf (return) Ask to the dwarf if he can launch something for climb up. He will launch his long beard and you will climb it.
He will tell you to convince to the princess about let him free. The princess will accept but only if you return to her a pendant. Ask to her for the key to the house and go to the witch's house.
You need get leathers gloves, two tarromin and two vials (mix them) With the leather gloves open the door and take the music sheet. Play the piano following the instructions on the paper. If you do sucesfully you will get some stuff on your inventory.
Time to become small. Make the potion and drink it at mouse hole. You will need to climb nails for access to the pendant hidden there.
When you find the pendant return to make free the dwarf on tower. You will get as reward the helmet. Return with it to Sylas on Taverly.
You will get the beans as reward but you will know the truth about. He will tell you to plant them at south of taverly on a made patch. After watered it you will see it grow big and fast to the cloudy sky.
The monster there is level 138 and attacks basically only with melee. Bring your best melee outfit and pray vs melee (bring prayer potion) A full inventory of food and ring of recoil for battle is recomended.
If you fell that you can't win is recommended bring a fast teleport. If you manage to win, go to Sylas and he will tell you cut the tree. Before cut the tree use the potion made with tarromin on the tree. After cut return to Sylas for reward and congrats, quest complete.