Table of Contents

Root chakra puzzle

[iron labyrinth module]

This page contains spoilers for the Iron Labyrinth one-shot

The Iron Labyrinth has six puzzles for the players to solve. The Root chakra puzzle is the first puzzle that the players will encounter should they take the right-hand door from the starting positions

This may be the most challenging puzzle for the players


Puzzle setup

When the players enter the room, it is mostly empty. There is a large root chakra symbol carved into the floor, which covers more than half the floor. In the center of the room are three scales made of metal. The scales have spherical shaped recepticles hanging on chains. On the “south” side of the room is a metal apparatus with a track that is similar in appearance to a bowling ball-return. On the wall above the apparatus is a riddle, carved into the wall

One of these things is not like the others
One of these bakers is not like the dozen
Answer me this and win something bright,
Which baker is heavy, or are they light?

On the “north” wall is a shelf attached to the wall, on top of which is a glass case that encloses a floating Garnet

Once the players have stepped into the room and observed it long enough to hear the description above, the apparatus has a “click” sound, and 13 stone balls a little smaller than a bowling ball roll out and fill the track of the apparatus, similar to the way it would look if a bowling ball return was full. The balls are numbered 1 through 13 with what looks like paint but is closer to a clay and rubs off if exposed to water

If the players attempt a fourth weighing, all balls not currently being bound to a players ki float out of the room. Shortly after this a new set of 13 balls is delivered to the players via the apparatus

The odd ball is always the ball marked 13. Each time a set of balls is delivered to the players, make a show of rolling 4d6 so that the players believe the result is always random. If the result of the roll is even, the 13th ball is heavy, if the roll is odd, the 13th ball is light. Fun fact, 4d6 can be used to simulate a 13 sided die

If the player tries a Recall knowledge or Deduction (Investigation) check and gets a 3 or higher, they remember/solve the standard solution and realize that with 13 balls and 3 measurements, they will always be able to find the odd ball, but may or may not know if the ball is heavier or lighter


Normal solution

This problem is often posed as the 12 ball problem or the 8 ball problem, giving the players a set of balls and just enough uses of the scale to accomplish this. The solution involves figuring out the appropriate number of balls to weigh against each other such that you discover the odd ball. The solution is straightforward but has alot of moving parts, here is a link to an excellent write up of the solution.

As the question is worded, this puzzle cannot be solved without luck. It would be possible to find the odd ball out of thirteen with three weighings if we only needed to identify the ball. Since the riddle requires whether the ball is heavier or lighter, we need more than three weighings


Actual solution

There are a few ways the players can tackle this that i can think of:


Reward

The garnet floating in the case has six facets and Power Overwhelming 3. This grants a +3 bonus to a player's strength score (not modifier) if the stone is bound to the players heart chakra. It can also be bound to the lotus chakra

An increase to a player's strength modifier grants:

Points

Method of solutionPoints
Solved by blind experimentation or skipping the puzzle and simply guessing the ball3
Without understanding the problem with the puzzle, devise a solution and get lucky4
Understand the riddle and weigh ball 13 against other balls to find out if it is heavier or lighter6
Devise a logical solution that uses petramancy or desimancy to correctly solve the puzzle9
Understand the riddle and use petramancy or desimancy to force the correct solution12