The Undying King is a tricky beast. Not that Remnant: From the Ashes isn't chock-full of difficult bosses, but we can't help but think that the Undying King boss fight is one of the hardest encounters all around. This guide will try to help you out with that.
Of course, this guide presumes that you're not too keen on working for the Undying King, because Remnant gives you that option, too, in classic Weird Fiction fashion of subverting expectations. If you're dead-set on killing this boss, keep reading.
How to Damage the Undying King?
Right off the bat, it should be obvious that the Undying King is no pushover. You'll notice that, at the start of the fight, the boss has four Vyr creatures nearby. Note that they will attack you soon as you trigger the boss encounter, and since they're fast and beefy, chances are that you'll get wounded right away. Ignore the Undying King until you manage to kill off the Vyr guardians, because you can't deal any damage to him while they're attacking you.
When all the Vyr are down, you're going to have a very brief window of opportunity to damage the Undying King. When the damage phase is up, the boss will summon more Vyr and two additional floating turret constructs. Turrets deal a lot of damage, so try to take them down without being overly exposed.
This is easier said than done, of course, because the Undying King can summon not only additional Vyr reinforcements but also entire swarms of fast-moving monsters that you're going to want to deal with fast. The Chicago Typewriter is as good a weapon choice as any, and it should certainly be obvious by now that you want at least a few people with you when facing the Undying King.
How to Kill the Undying King?
As you successfully progress through the Undying King's numerous damage phases, you'll notice that he'll grow increasingly more aggressive, and that he'll rely more heavily on his dual sickle melee attacks. Be prepared to roll past him as he charges as that's the only sure-fire way for you to avoid taking excessive damage.
We suggest using your consumables and taking down enemies while the Undying King makes his retreat to the big recharge platform. He's going to heal there no matter what, so your best bet will always be to do the same, so that you're ready for the next phase of combat.
Now, it's going to take a while, but eventually, you're going to take the Undying King down. True to his name, he won't stay down for long. While it might be tempting to unload all of your reserve ammunition and high-powered rounds into him while he's recovering - don't. Instead, use this downtime to heal, reload, and rearm, because you're not nearly done yet. After his major rejuvenation phase, the Undying King is going to return with a fraction of his starting health bar, and you're going to have to dish out damage yet once more.
It is advised that you make your way to the platform high-up, as that should provide a solid vantage point for the final part of the Undying King boss fight. Damage phases work the same as they did before, and when you finally punch through the remainder of his health bar, the Undying King should be dead for real.
If you've reached the Undying King, surely you've come across the Citadel Curse as well. That can't have been an easy dungeon. Did you know that you can use the Twisted Mask to heal? We hope these tips and tricks help you out on your quest!