How is the eleventh treasure found

Hint 1 of 9:

The High Priestess has a clue

Hint 2 of 9:

The Sentry has another

Hint 3 of 9:

The Dream gives a third clue

Hint 4 of 9:

The Nightmare gives a fourth clue

Hint 5 of 9:

The name of the treasure is formed in the 5x5 block grid on the Map

Hint 6 of 9:

Put the letters from the Wheel on the Map in the lower right section

Hint 7 of 9:

Add the letters from The Singer and The Warrior

Hint 8 of 9:

Add the letters from The Dead Warrior, The Tower and The Plain of Bones