Dark Souls III: Oceiros the Consumed King Boss Fight

Oceiros is technically an optional boss in Dark Souls III, in the sense that you can progress to and kill the end boss without killing him. However, killing him grants access to three other optional bosses that you can’t get to otherwise, so you’ll be missing a lot of content if you skip Oceiros.

I found Oceiros to be one of the easier bosses in the game. I went in without having any idea of what I was going to encounter and still killed him on my first attempt. There are few other bosses in the game I can say that about as most of them require some practice and patience ;-)

Phase one in particular felt easy. I have no idea what he was doing most of the time, he seemed more obsessed with attacking the wall than attacking me, but I’m not one to let an opportunity like that slip past me, so I managed to get some cheap blows in.

When he has around 50% health left, phase two starts.

In phase two, he becomes a lot more aggressive, flies up into the air, rushes at you and seems to use his Crystal Breath attack a lot more. He is a lot more unpredictable, and this part of the fight definitely seemed like the more dangerous one.

The key to phase two seems to be to try to dodge to the sides rather than back, both when he charges and when he uses his crystal breath. When he pauses after a rush or a scream, it’s a good time to try to land one or two fast hits. Don’t get greedy.

Try to avoid standing directly in front of him, his slam and charge attacks hit very hard. And finally, make sure to be ready for his grab attack – he lunges forward and can deal massive damage.

After you kill Oceiros, you can move into the area immediately after his room, where you will find the unique gesture called Path of the Dragon. This gesture will give you access to Archdragon Peak where two more optional bosses await.

But before leaving this area, move to the end of the large room where you find the gesture. The back wall is illusionary and attacking it will grant you access to Untended Graves where there is another bonfire and another optional boss to have fun with – a harder version of a previous boss, to be exact. Because Dark Souls III is apparently too easy ;-)

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Fan art inspired by this boss fight

Anime style fan art of a dark armored warrior facing a dragon-like king in ruined cathedral moments before battle.
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Anime style warrior in dark armor facing an enormous dragon king inside ruined flooded cathedral before battle.
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Shadow armored warrior seen from behind facing a colossal dragon king in flooded cathedral ruins before battle.
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Dark armored warrior seen from behind confronting a massive dragon-like king in a ruined flooded cathedral before battle.
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Isometric view of a dark armored warrior confronting a colossal dragon king in a flooded ruined cathedral before battle.
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Further Reading

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• Dark Souls III: Dragonslayer Armour Boss Fight
• Dark Souls III: Ancient Wyvern Boss Fight
• Dark Souls III: How to Make 750,000 Souls per Hour with Low Risk