Messmer is one of the strongest bosses in Elden Ring, not just in DLC, and players must defeat him to get Messmer's flame and burn the Shadow Tree to progress the story. However, Messmer is quite tricky to find and very difficult to defeat in the game. To make it easier for you, here is a complete guide on how to find and defeat Messmer the Impaler in Elden Ring Shadow of the Erdtree.

While finding this mega boss in the Ring of Fire isn't too difficult, it does require a few steps. Messmer is located in the Shadow Keep, north of Scadu Altus. To enter Scadu Altus, you must defeat Rellana in Castle Ensis. After you enter Scadu Altus, keep heading north until you see a looming dark fortress.

You will be able to enter it without any problems and meet the golden hippopotamus at the entrance. Continue reading to learn how to find Messmer in the Shadow Keep.

Messmer's position in the Shadow Keep is a bit tricky. First, you need to access the Shadow Keep Church district, which is a completely different path than normally entering the Shadow Keep. Next, you need to make your way to the Specimen Store House Back section. From there, you must activate a lever to move the trial platforms.