How do you to get to the Blue Womb to fight Hush?

[Gargoyle sex]

In my 3 most recent successful runs
I played as Cain
defeated It Lives! under the span of 30 minutes
but the only options of proceeding are either to Sheol or The Cathedral

I want to get all of the completion marks for Cain as I already beat Mother's Heart, Isaac, Satan, and Boss Rush with him
I remember fighting Hush once as a different character but it was a while ago, I ended up losing badly cause my DPS wasn't good and I don't remember what I did to get to him

[Dwarvin' Marvin]

As long as you're playing on Afterbirth or above, the only condition for it opening is beating It Lives! before the 30 minute mark on the in-game timer. You unlock it along with blue baby after beating Mom's Heart 10 times.
If it isn't opening in those conditions, then there's some mod conflict that is preventing it from opening, because I believe the only time in-game where it doesn't open once you have it unlocked is during challenge/daily runs.

It will always be open as long as you've beat the boss/entered the cleared boss room before 30 minutes. The only exception is if you manually open it with Mama Mega or the buffed Mega Bean in Repentance+.

[noisyturtle]

I have never been 100% certain if you need to beat the boss rush for blue womb to show up, or can you skip it and as long as you beat Mom in time for boss rush to show up, BW will show up later anyway?

I have always just done the boss rush, or started it and teleported out

[Dwarvin' Marvin]

Originally posted by noisyturtle:

I have never been 100% certain if you need to beat the boss rush for blue womb to show up, or can you skip it and as long as you beat Mom in time for boss rush to show up, BW will show up later anyway?

I have always just done the boss rush, or started it and teleported out

No, you don't need to do boss rush. You can skip it. You just need to beat Womb II before 30 minutes.

[Gargoyle sex]

Originally posted by Dwarvin' Marvin:

As long as you're playing on Afterbirth or above, the only condition for it opening is beating It Lives! before the 30 minute mark on the in-game timer. You unlock it along with blue baby after beating Mom's Heart 10 times.
If it isn't opening in those conditions, then there's some mod conflict that is preventing it from opening, because I believe the only time in-game where it doesn't open once you have it unlocked is during challenge/daily runs.

It will always be open as long as you've beat the boss/entered the cleared boss room before 30 minutes. The only exception is if you manually open it with Mama Mega or the buffed Mega Bean in Repentance+.

Oh I see my error
I thought the 30 minute timer was for the It Lives! boss fight alone
not the entire run
Skimming through the wiki and online guides didn't specify that

It makes so much sense
Like I thought it was really weird that the conditions seemed way too easy and yet I still couldn't meet them