Puzzle - Dice

On 5/19, The Immortal Fortress twitter account posted the following message and picture..."An image from the Sage, aside a written clue: “The final spell, of which this is a part, will leave the wielder’s fate within your hands. And once the final casting’s in the bag, you’ll open up the gate to distant lands.” #NoStoneUnturned - @immortal4ttress, 5/19 @ 2:50PM"

Solution
It didn't take long to figure the missing word out. Based on the other images, it was determined that each letter in the word was based on either the die or the price: Putting all that together reveals the word to be "PRAY".
 * First letter is the first letter of the color. In this case, the letter is "P".
 * Second letter is based on the number shown; "O" is 10, "A" is 4, etc... In this case, the letter for a 6 is "R".
 * Third letter is based on the type of die; a d20 is a "K", a d12 is an "L", etc... In this case, the letter for a d6 is an "A".
 * Fourth letter is based on the price; $0.40 is an "E", $0.50 is a "K", etc... In this case, the letter for $0.35 is a "Y".