Which bosses are locked behind quests and are missable?

[The88shrimp]

So I'm going through doing a RL1 all boss run and am afraid I'm going to lock out a boss due to failing a quest. I know about all of Ranni's quest line bosses but what about Mohg? I haven't fought him at all yet but heard that's part of a questline. I also know about patches and have already fought him. Are there any other missable bosses like this?

[Ulmace]

mohg can be accessed without doing the quest, there is a teleporter in consecrated snowfield.
the only boss i can think of is the cruciable knight that guards tannith.
and also the dragon at the end of fia's quest, you cant fight him if you kill her.

[königplatzen]

Lichdragon Fortissax needs Fia's and partly Ranni's quest

Some bosses are quite hidden also.
f.e. Mini-Mogh can be found under the sewers of the capital
All the Night Calvary's, Death birds and Bell Bearing Hunters are only show up at night, etc.

I think, this map is quite helpful, as you can show only bosses (some bosses are no real bosses with healthbar):
https://mapgenie.io/elden-ring/maps/the-lands-between

if you can't access a boss, you could look up, how to get it

[Dollmaker]

I think only Margit and Fortissax are missable.

[The88shrimp]

Originally posted by königplatzen:

Lichdragon Fortissax needs Fia's and partly Ranni's quest

Some bosses are quite hidden also.
f.e. Mini-Mogh can be found under the sewers of the capital
All the Night Calvary's, Death birds and Bell Bearing Hunters are only show up at night, etc.

I think, this map is quite helpful, as you can show only bosses (some bosses are no real bosses with healthbar):
https://mapgenie.io/elden-ring/maps/the-lands-between

if you can't access a boss, you could look up, how to get it

Yeah I've been using the map. It's not bosses that are hidden as such just more so ones that I might get locked out of if I progress the story too far that causes quests to fail if you haven't started them early enough

[Tolnin]

I know this is very old but thought I'd answer some for any possible people looking for the same answer. I think Fortissax, Astel, and Adula are the only ones locked behind a quest

You might actually be able to access Astel without doing Ranni's quest, but I included it just in case. You CANNOT access Adula without doing Ranni's quest though

And fighting Fortissax is a mixture of doing Ranni and Fia's questlines

I don't think there are any other bosses locked behind quests or anything like that, but I could be wrong

[Mike]

This thread was quite old before the recent post, so we're locking it to prevent confusion.