The Stone Tower

There's an old stone tower near the farm. A cultist from my dreams was standing near it. Perhaps someone around town can tell me more about the structure, and how to get inside. I wonder where I could find someone knowledgeable..?
Professor Dayton said that life energy can open the door to the stone shrine near the farm. He said to take a closer look at the markings on the door.
The stone tower has some kind of counter carved into the door. According to Professor Dayton, growing crops and raising animals should weaken the seal. Maybe the counter will go down as the seal weakens..?
Delve deeper into the Shrine of Xxarteck, uncovering its hidden secrets with the help of Prof. Dayton.

How to start

Examine the Shrine Door in Farm to start the task.

Requirements

Ancient Iron Key

Walkthrough

Find someone in town who knows about the stone tower.
Talk to Prof. Dayton in Library and answer I'm looking for some information, then Ask about the stone tower, then How do I get inside?.
Examine the markings on the door of the Shrine of Xxarteck.
In Farm: The door's seal appears to be at …% strength.
Open the shrine door by weakening the seal.
Weaken the seal on the door in Farm: it opens after 200 points of farming, counted once you have examined the door. Crops you harvest count, and collecting from an animal counts about one time in four (how the seals work).
In Shrine of Xxarteck 1f: ...It's a big hole.
Ask Prof. Dayton about the strange markings inside the tower.
Talk to Prof. Dayton in Library and answer Ask about the stone tower.
Insert crops into the hole until something happens.
Put items into the hole in Shrine of Xxarteck 1f until they are worth 2000 in all; each counts for half its price.
In Shrine of Xxarteck 3f: Strange, ancient text is carved into the stone receptacle.
Ask Prof. Dayton about the strange writing in the tower.
Talk to Prof. Dayton in Library and answer Ask about the stone tower. You get Translation Notes.
Investigate the Shrine of Xxarteck further.
In Shrine of Xxarteck 5f: Perhaps Prof. Dayton knows how to open this..?
Carry the Translation Notes to read the riddle on the Sealed Door on 3F, then offer the right items to the vessels there. The doors on 3F and 4F open the same way as the farm door (how the doors work).
Ask Prof. Dayton about the giant keyhole.
Talk to Prof. Dayton in Library and answer Ask about the stone tower.
Enter the final sealed passage.
Talk to Gallery Attendant in Art Gallery and answer Ask about the big key on the wall. You get Ancient Iron Key.
Use Ancient Iron Key on the Sealed Door in Shrine of Xxarteck 5f: You place the Ancient Iron Key in the giant keyhole.
Reach Shrine of Xxarteck 6f.
Win the fight against Emissary of Xxarteck and Growth.
The Gallery Attendant only offers the key once the Art Gallery exhibition is complete.
Tell Prof. Dayton that you've slain the Emissary of Xxarteck.
Talk to Prof. Dayton in Library and answer Ask about the stone tower. You get Totem of Community.