The titular Hammer of Fortune fill with energy as you spin your reels. The more you spin the more energy in the hammer.
When it’s full, you can choose to use it when there are three treasure chests which are on adjacent reels but not ones that are horizontally next to each other. Then, you can choose to knock out five symbols with the hammer to try and get to that all-important sequence of three in-a-row… which activates the Loot Chest Wins! Which could then lead to free spins.
What this means is that there is strategy involved, with tactical playing meaning you will perform better when using the Hammer.