After Beating shard 4 you probably gained a weird note from the endboss.
This guide explains what it means and what it leads to!
in Shard 5
this guide will contain spoilers, proceed with caution!
Schematic and Its Meaning
This is the Schematic necessary to gain the crown in the first place.
This shows you which statue you have to hit how often in the Grove.
They will always spawn in order so you have to hit the statues in the following order
First: 9
Second: 8
Third: 3
Fourth: 5
NOTE: Hitting them while they shake does not count as hitting them so you can use a shotgun for it
After succesfully hitting the statues and defeating Denial
before entering the metro you’ll see the Crown. Take it, and now
DON’T GET HIT TWICE
Key Solution
you are also required to carry one curse with you
You can go to the Hive or the Funnels, both work so choose the one that is easier.
If you decide to go funnels, you have to get to the Frog King.
The Frog king hides behind a secret room at the last floor of the Funnels before the boss.
Normally you would need to avoid scaring the frogs but with the crown you do not need to worry about that.
If you decide to go Hive, you have to Defeat B.Anger
The only thing you need to worry here is not to get hit.
After defeating B.Anger, a light will be there in the middle of the room that ask you
to offer something, give the light the crown.
Doing both will award you with a Key.
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Those keys are necessary for the similar looking doors you find when you walk past the Metro
Enter the door and you will arrive at the new area 2.5
Forgotten But Still Important
Well this area is the reason!
This part is very straight forward, go through this area that has enemies from Ticking Top Tower and the Sepulcher.
at a certain point you will see a Flameless Brazier, what you need to do here is to simply interact
and it will eat your curse for a new item
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BONUS SECRET:
in the Brazier room if you have wings or the Scorpio hook fly or shoot straight up
if you do you will enter a new little secret room with the Portraits of Community Members
if you go to the right in that room you see a special doll that is a reference to Revita Kids old design
Reflecting On It
What you have to do with this is find the Mirror room.
the Mirror room is behind one of the secret rooms in the Arid Athenaeum,
so keep your eyes open for it.
But if you find it, be patient and wait for a bit in here, as after a while it will break and it will give you the good old Mirror shard.
Now you just need to arrive at the Blacksmith and fully upgrade it.
You’ll receive the Mirror Prism, another key item for this entire scavenger Hunt
The Light in the Dark
You now just need to go to the Caldarium or the Sepulcher.
Eventually, one of the enemies, when killed, will spawn a beam of light.
You need to get the Orbital in the light an let it shine light to most of the room with it
Then, you have to go to the Shiny spot and interact, receiving a Broken Pocketwatch.
This will be used later.
The Last Step
You need to enter the new last area and find this room.
Here you need to insert the prism in the middle machine. Don’t interact with any of the screens yet. You now need to check the Broken Pocketwatch and enter the code. This code is always randomly generated.
If the code is entered correctly, you will receive the Void Prism.
As soon as you acquire it you just need to finish the game and hop in the new thing at the end.
And now, everything is done.
Thanks to LordSkullington and BlockCabin for his great guide, all credit to his effort. you can also read the original guide from Steam Community. enjoy the game.