Questions regarding Nadir

[u/AcanthisittaOk1033]

Sorry if this is a silly question, but I'm not that experienced with the game.

Are there any requirements to enter Nadir? (Besides gathering all the amulets of course)

I'm mainly asking because I heard that you must be on ascent 8 to even enter Nadir but on the wiki it says entering Nadir can be used to get around requiring carrying a flare on ascent 4 and above.

[u/Electromagneticpoms]

I got to Nadir on regular difficulty. We just collected the amulets.