The Daily Prize Wheel is a Game Mechanic that allow you to get a free item for each day you play Blocksworld. For every 24 hour / A day you get to spin a wheel and what ever the wheel land on you will get a free item. The Rarity of which item can only appear on the wheel is Common, Rare, Epic and Legendary.
There is a Prizes Showcase that tell you which of the item will be available in the prize wheel that you will get. After you spin your prize wheel then for a few hour the new available item will be in the Prize Wheel for you to earn.