Highlight the white text inside the block for hints ranging from vague to specific...
You may need to look back on where you've been...
Find the names of the 10 characters whose eyes are in the wall, in order. Next hint is the list.
From top to bottom:
1. Vampire--Five of Clubs
2. Werewolf--Nine of Diamonds
3. Satyr--Ace of Spades
4. Mermaid--Two of Hearts
5. Sphinx--Ten of Clubs
6. Muses--Nine of Spades
7. Musketeer--Ace of Diamonds
8. Pirate--Jack of Diamonds
9.Elves--Seven of Hearts
10. Leprechaun--Four of Clubs
You'll need to extract a single letter from each name in order, but which ones? The page text has a clue.
Imagine a rivulet of water pouring down the list of words, starting somewhere near the middle of the first word and flowing down in an imperfect line.
Use index value 4 for the first word, then use index value +/- 1 from the previous index value for all subsequent lines. With this, you can pick out the word PERMISSIVE, which is the answer. (It doesn't appear to have anything to do with the bricks or indentations of the eye pictures.)