Summary
If there is one single calling card that could encompass the entireDark Soulsseries, it would almost certainly bea reference to boss battles.FromSoftware has gone from a relatively fringe developer to being one of the top AAA developers in the world in large part due to their willingness to craft lots of brutally challenging boss fights for their players to overcome.
Dark Soulsput this style of game on the map(although it all began withDemon’s Souls) and to this day many of the series' boss battles are legendary. However, that doesn’t mean that they’re allmandatory.In fact, FromSoftware likes to stash some of their most challenging bosses in areas that players don’t even need to find before finishing the game. Just because these bosses are optional doesn’t mean they won’t make for worthy challenges.
Updated June 13, 2025, by Evan Regan:The Dark Souls series has never been shy about throwing brutally-difficult bosses at its players during moments when they don’t expect it. There will always be a major boss at the end of an area with its fog door visible well ahead of time, but these bosses don’t necessarily operate that way. Many optional bosses in the Souls series come out of nowhere, and offer up some of the stiffest challenges in the franchise. This list has been updated with a few more of those bosses, particularly ones from Dark Souls 2, which has a ton of purely optional boss fights that will completely break players who aren’t ready for them, and even some who are.
Gwyndolinis Lord Gwyn’s youngest child, but due to being born under the sign of the moon, Gwyn raised him as a daughter to prevent his ascention to Gwyn’s heir. As such, Gwyndolin is hidden away in Anor Londo, and can easily be missed if players don’t know where to look. Surrounding the second bonfire in Anor Londo are a series of statues, including one of Gwyn himself. If players enter this room while wearing the Darkmoon Seance Ring, Gwyn’s statue will disappear, and a statue of Gwyndolin will appear in its place.
Players can either pledge allegiance to Gwyndolin’s Blades of the Darkmoon here, or they can attack the statue, revealing an illusory wall and the path to Gwyndolin’s boss room. The fighttakes place in a seemingly endless corridor,and while it isn’t exactlyhardby the standard definition, it can be a struggle just to reach Gwyndolin, let alone damage him. He relies on ranged attacks and forces the player to hide behind pillars recessed in the walls for protection. Once his attacks are avoided, it becomes an all-out sprint to reach Gwyndolin and attack him before he teleports away.
13Moonlight Butterfly
Dark Souls
TheMoonlight Butterfly’sdifficulty isweighted heavily by the RNGthat players face while fighting it on any given run. Between its laser beam attack and its charge-up AOE while perched on the arena’s bridge, this boss can easily wipe out a player’s health in a matter of seconds.
Maybe the hardest aspect of this boss is its arena: a thin stone bridge with doors at either end and the player trapped in the middle. It’s very easy to tumble off the bridge accidentally, and because the Moonlight Butterfly hangs around the fringes, locking onto it can throw off the direction of a dodge roll and send players falling to their deaths.
By the midway point of theCrown of the Ivory KingDLC, around the time when they discover the Frozen Wastes, players will have already fought Aava, The King’s Pet. So of course, the next step is to fight the King’s other two pets at the same time.
Lud & Zallencan be found in the furthest reaches of the Frozen Wastes. When players get Lud’s health down to 50%, Zallen will appear. Zallen has a berserk attack that will regenerate its health and increase its damage. It’s a heck of a time, although not nearly as difficult as surviving the Frozen Reindeer that litter the path leading up to this fight.
11Capra Demon
TheCapra Demonbecomes a bit of a pushover once players know the trick to beating him, but prior to that, when they first wander into his painfully small arena, this boss can be a nightmare. Ask anyDark Soulsveteran and they’ll tell you: it’s not just the Capra Demon himself,it’s the dogs.
Two of them, specifically, will charge players the second they cross through the boss' fog wall. It’s an immediate distraction from the boss, who also begins closing ground quickly but can get lost in the background. The trick, now widely known, is to run past all three and up the stairs at the back of the room. It’s the only way to separate the dogs from the boss and deal with them one-on-one.
10Ruin Sentinels
Dark Souls 2
Found at the midway point of the Lost Bastille, theRuin Sentinelsare a squad of three giant statues armed with shields and halberd-like weapons. They’re surprisingly fast for their size, and the layout of the arena makes it difficult to keep an eye on more than one of them at a time. Players can lure one up to the platform where they start the fight, allowing them to kill it one-on-one before tackling the other two, but even then, two against one still isn’t a fair fight.
Thankfully, there is a way to avoid the fight entirely; it’s just very elaborate. Players must first defeat the Pursuer in the Forest of Fallen Giants, then take the bird’s nest to the Lost Bastille. Down a path to the left they’ll find an Antiquated Key. Head back to the Lost Bastille’s first bonfire - accessed by killing the Flexile Sentry in No Man’s Warf - and go forward until they encounter a pair of dogs and a Heide Knight. Smash the planks on the right, unlock the door behind them, go down the hall, and use a Pharro’s Lockstone on the slot in the room ahead. Past a couple of illusory walls, this path will reveal an elevator that takes players to the area past the Ruin Sentinels. With all that said, it may actually take less effort to just fight the boss.
9Sir Alonne
Many of the most epic fights in theDark Soulsseries play out against giant monsters whose sheer size makes for an epic achievement when they’re finally taken down. Sometimes though, a showdown between two warriors bearing nothing but swords and armor can be just as epic.
EnterSir Alonne, found in the memory of the Old Iron King inDark Souls 2’sCrown of the Old Iron KingDLC. Alonne is such a badass that the Iron King named his army after him, and this fight reinforces that decision. Alonne is fast, skilled, and capable of parrying the player’s attacks with ease. This fight is a true test of skill in a way that few are and awards a special death animation to players who defeat Alonne without taking damage.
Players encounter this boss' first incarnation at the conclusion ofDark Souls 3’s tutorial, and when they stumble upon him again in the game’s late stages, that familiarity may cause them to take this fight lightly. That will prove to be a mistake, likely around the time whenChampion Gundyrcrushes them beneath his halberd.
Here players are fighting Gundyr at the height of his abilities. He moves faster, hits harder, and is generally far more aggressive thanhis corrupted counterpart Iudex Gundyr.This fight will strain even the most experienced players, all the more so with the awareness that they’ve already defeated this warrior ringing in their minds as Champion Gundyr schools them repeatedly.
7Vendrick
Few bosses are more optional thanKing VendrickinDark Souls 2.The once proud King of Dranglaic, Vendrick has gone hollow, and now wanders lamely in a circle, moaning as he drags his massive greatsword behind him. He is completely non-hostile and will only attack players after they attack him several times first.
Players can fight Vendrick when they first meet him, but it is not advisable. His defense is unmatched, and he deals a ton of damage. Players are better off venturing into the various Giant’s Memories by using the Ashen Mist Heart, and collecting as many Giant’s Souls as possible. For every Soul of a Giant players have in their inventory (there are a total of 5 in the game),Vendrick’s damage reduction is cut in half,making him a much easier kill. Or, players can avoid the fight entirely, as they only really need the King’s Ring from the room he’s in. However, killing Vendrick means players will later find the Soul of the King in the Shrine of Amana.
6Black Dragon Kalameet
There’s nothing like a good dragon fight,andBlack Dragon Kalameetgives players exactly that. The build-up to this boss alone makes for an epic showdown once the fight finally happens. Kalameet is visible in the sky multiple times before the fight, yet he cannot be damaged. Players will have to enlist Hawkeye Gough and his massive bow to shoot Kalameet out of the sky, and that’s just so the battle can begin.
Once grounded, Kalameet is a force. His attacks come in wide swings and slams that are difficult to dodge, and his black flame attacks cover huge swaths of the arena in fire. He can also take to the air and attack in flight, which only adds to the challenge. There is no perfect tactic for this fight. Players should come prepared with as much Estus as they can, because they may be fighting for a while.
5Darklurker
One of the most unique bosses in the series, theDarklurkercan only be accessed by joining the Pilgrims of Dark covenant and clearing out three Abyssal Dungeons. Then players will have to return to Darkdiver Grandhal to access the Darklurker fight.
The Darklurker looks like it was pulled straight from aDiablocutscene. Equal parts angelic and monstrous, it primarily uses soul magic attacks but has a few abilities that make it stand alone. For one, it can turn invisible, but it can also teleport and will create a copy of itself at around 50% health. Once there are two Darklurkers the fight becomes frantic as players try to attack one of them while avoiding the other.
