Gedonia 2, early access: episode 18, the path of evil

Consider this a guide on how to open the door at the end of the first dungeon in the game which is part of the main quest line. You need three runes which each act as keys. You can obtain them in any order.

Here's a basic summary. One rune is obtained from serving the will of the forgotten god and defeating him after he decides to kill you. One rune is obtained from the chronological second secret area in the Lazarian temple dungeon, which is somewhat hidden in that tunnel. One rune is obtained during the quest to enter the abyss realm and choosing to enslave the titan instead of freeing him which results in battling a powerful monster. Bring all three runes to that door in the necromancer's dungeon to encounter an easter egg from the first Gedonia's main story.

I didn't show one of the items obtained at the end, but know that it's a helmet that grants melee and destruction bonuses. It's very good. Great stats for defense and offense.