How do i unlock the isaac boss?

[Tea]

im looking everywhere

[Memo]

https://www.google.ro/search?q=isaac+how+to+unlock+cathedral&oq=isaac+how+to+unlock+cathedral&aqs=chrome..69i57j0l3.8717j1j7&sourceid=chrome&{google:instantExtendedEnabledParameter}ie=UTF-8

[MobiusPizza]

Try looking at the wiki
https://bindingofisaacrebirth.gamepedia.com/Isaac_(Boss)

[Tea]

Originally posted by high croco:

https://www.google.ro/search?q=isaac+how+to+unlock+cathedral&oq=isaac+how+to+unlock+cathedral&aqs=chrome..69i57j0l3.8717j1j7&sourceid=chrome&{google:instantExtendedEnabledParameter}ie=UTF-8

frick. why do they need you to beat moms heart 10 times lmao

[Nazemec]

Originally posted by 𝕸𝖊𝖒𝖎𝖈:

Originally posted by high croco:

https://www.google.ro/search?q=isaac+how+to+unlock+cathedral&oq=isaac+how+to+unlock+cathedral&aqs=chrome..69i57j0l3.8717j1j7&sourceid=chrome&{google:instantExtendedEnabledParameter}ie=UTF-8

frick. why do they need you to beat moms heart 10 times lmao

It's 11 times actually, not 10. And because there's a different unlock each time. The 11th one (the last) is a permanent access to both versions of floor 9 (Cathedral and Sheol).

[Tea]

Originally posted by Nazemec:

Originally posted by 𝕸𝖊𝖒𝖎𝖈:

frick. why do they need you to beat moms heart 10 times lmao

It's 11 times actually, not 10. And because there's a different unlock each time. The 11th one (the last) is a permanent access to both versions of floor 9 (Cathedral and Sheol).

nice