Floor 6 is now available in The Hollow. You must avoid the Mimic anomaly, locate the puzzle room, and brew a concoction to earn the Amazing Liquefactive Bighead UGC and badge. As with previous floors, completing the puzzle rewards you with a relic that you must return to the elevator. Here's how to solve the Floor 6 puzzle and claim your rewards.
Floor 6 Puzzle Room Location in The Hollow
Unlike Floor 5 and the previous floors, Floor 6 in The Hollow is covered in darkness. You must bring a Flashlight or Night Vision Goggles from the Little Shop of Terror with your Hollow Tickets to navigate the maze safely. This time around, you're being chased by the Mimic Anomaly from Animal Hospital so stay vigilant.
The puzzle room's location is random, but I found it on the left side of the maze, next to the Grand Theatre room. If you've played Animal Hospital, you'll recognize the room as its game lobby.

How To Solve Floor 6 Puzzle in The Hollow
Here's how to solve the Floor 6 Puzzle:
1. Find the Cauldron
After entering the Floor 6 Animal Hospital puzzle room in The Hollow, turn right to find a Cauldron. Check the recipe displayed above it to identify the ingredients you need. My recipe required Red, Orange, and Cyan ingredients, but the recipe may vary between players.

2. Find the First Ingredient
Explore the hospital lobby to locate the colored ingredients. I found all three ingredients in the lobby, although their locations may vary between players. Collect the first ingredient and bring it back to the Cauldron.
3. Collect the Remaining Ingredients
Repeat the process for the other two ingredients. Find each ingredient separately and bring it back to the Cauldron one at a time. Make sure you collect all the required colors listed in your recipe.

4. Brew the Concoction
Once you collect all three ingredients, add them to the Witch's Brew according to the recipe. Brewing the correct concoction rewards you with the Relic.
5. Return the Relic to the Elevator
Take the Relic back to the elevator to complete the Floor 6 puzzle and earn the Amazing Liquefactive Bighead badge and UGC accessory.
Also Read:
The Hollow Floor 6 Rewards
After earning the Floor 6 badge, you can return to The Hollow event hub. You also receive the Amazing Liquefactive Bighead accessory along with the badge, so you don't need to claim it from a specific location. You can check out other free UGC items you can claim during The Hollow event.

That covers everything you need to know about completing the Floor 6 puzzle in The Hollow and earning the Amazing Liquefactive Bighead badge and UGC accessory.
FAQs
Floor 6 is shrouded in complete darkness. You should buy and equip a Flashlight or Night Vision Goggles from the Little Shop of Terror before entering.
Successfully escaping Floor 6 with the Relic automatically awards you the Amazing Liquefactive Bighead Badge and UGC.
Look at the recipe displayed above the cauldron to see the required color combination. Search the hospital lobby for the matching colored ingredients, return to the cauldron, and add them to brew the concoction and collect the Relic.