Some bosses in the Core Keeper do not spawn by default after you defeat them, you will need to meet some specific requirements before you can re-summon them. This guide will show you how you can summon Ghorm the Devourer in the Core Keeper.
Ghorm the Devourer Summoning Rune – Core Keeper
If you have already defeated Ghorm the Devourer and you want to fight him again, you are going to need a new item first. This item is called the Ghorm Summoning Idol.
You can purchase the Ghorm Summoning Idol from the Backpack Merchant.
NOTE: You can also find other summoning idols for other bosses in the merchant in exchange for some ancient coins.
The most difficult part in re-summoning Ghorm is finding his summoning rune. You will need to explore the circular track just outside the Dirt Biome.
As seen in the map above, you need to search the area outside the circular path until you see a path that branches out and ends.
You will see a summoning rune on the ground on this branch-off path, you may need to remove some of the slimes to see it.
After locating the summoning rune, simply place the Ghorm Idol to re-summon him.
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