After defeating a demigod, one of the "main" bosses in Elden Ring, you will find yourself in possession of a Great Rune. These Great Runes are powerful equippable items that grant different benefits depending on the item. In order to use a Great Rune, you will need to equip them at a Site of Grace and use a Rune Arc, which is a rare consumable item. After using the Rune Arc, the Great Rune will be active until you die or switch Great Runes. Before doing any of that, you will need to activate the Great Runes by heading to the corresponding Divine Tower. Like a lot in Elden Ring, it's a complicated, deliberately unclear process. Before we dive in, understand that this guide contains spoilers related to mainline boss battles. Here is where to find each Divine Tower.
Starting from the Liftside Chamber, the path to the Divine Tower is southeast, towards the massive bridge.
Godrick's Great Rune is obtained from defeating Godrick, who is located in the heart of Stormveil Castle. This is likely the first Great Rune you will obtain in Elden Ring. In order to use Godrick's Great Rune you will need to activate it by heading to the nearby Divine Tower.
Godrick's Great Rune is activated in the Limgrave Divine Tower, which is connected to Stormveil Castle by a massive bridge. To get there, start at the Liftside Chamber Site of Grace located in the northwest section of the castle. This will place you behind the multiple fire turrets and archers guarding the final gate that leads to the main gate. Go past these archers and to the left, taking the path toward the main entrance. Unless you want to clear out a ton of enemies here, it's recommended that you just sprint through.
