The Diablo 4 Across the Threshold seasonal quest can be quite difficult to complete. You need to find and awaken Realmwalkers (and subsequently defeat them) to complete this mission. However, this is easier said than done, since the Realmwalkers are not like any other ordinary monster. To find them, you must fight hordes of enemies and close Ruptures on the map. This will also be followed by a mini-dungeon afterwards.
How To Complete the Diablo 4 Across the Threshold Season 14 Quest

This is the third quest in the Diablo 4 Season 14 questline. You have two ways of completing this mission, both of which involve slaying a Realmwalker:
- Kill a Realmwalker after closing Surging Ruptures in Helltide Local Events
- Kill a Realmwalker after investigating Colossal Ruptures that sometimes open near Zarbinzet.
Out of these, I would recommend going for the Colossal Ruptures, as they not only give you a lot of experience but are also easier to locate.
Colossal Ruptures

These Colossal Ruptures spawn in the Fields of Desecration, which is located south-east of Zarbinzet. These spawn randomly for a limited time. So, you should open your map occasionally to check if you see the icon for one.
Once it has appeared, approach the Death’s Head Idol at this location to start the event. You will need to disrupt the ritual that is taking place here. Your main objective now is to expand the ritual circle to cover all three beacons. This is done by attacking the monsters and closing any tears that appear in the area.
The more tears you close, the larger the circle will become. Once it has covered all three beacons, the Realmwalker will appear, and you can defeat it.
Surging Ruptures in Helltide Local Events
These Ruptures work similarly to the Colossal ones, with the exception being that they can spawn anywhere. However, I would still suggest that the best place to farm them would be at Helltide itself.
After this, defeat the Realmwalker to get access to the Deathtoll Chamber.
How To Defeat a Realmwalker in the Diablo 4 Across the Threshold Mission

The Realmwalker has a major flaw, like many other big enemies, which is its back. If you stick behind it, you will be able to deal the most damage without much need for healing. There will be some attacks that can still reach you, but these should be much fewer than usual.
Secondly, you should watch out for the invulnerable phases of the Realmwalker. This happens twice throughout the fight: once at two-thirds health, and then at the final third.
During its immune phase, three Empowering Spires will be set up, which also fire a damaging blast in an area. You need to focus on these and destroy them first. After this, the enemy will start taking damage again.
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Deathtoll Chamber Guide in Diablo 4

These mini-dungeons are single-room arenas that you must conquer in 60 seconds to achieve victory. Once you start it, defeat all the enemies that spawn within the room in a minute.
As you kill enemies, the ritual circle will expand outwards. Once the circle is large enough, you can escape the room and complete the dungeon.
Therefore, I would recommend using the strongest classes in the game for now, like Barbarians and Druids. However, any class can clear these challenges if they are built properly. Finally, head back to Dannica in Zarbinzet to finish the Diablo 4 Across the Threshold Season 14 mission.




