You must have good align. Go to the head priest of Tlaloc.
For women:
ASK HEAD FERTILITY, he asks you to dance, DANCE, he should say something like 'Come back when we call for you, we will have need of you on the final night of Ochpanitztli.'
At some point while you are sleeping you will be asked to return and worship Tonatiu, according to Wikipedia this festival is Sept 17 – Oct 6, so theoretically it should happen then hehe. I will update this again in one mud year... hahahahaha
For men: ASK HEAD NEW YEAR, he asks you to dance, DANCE
On the morning of April 23, you may receive a dream telling you that you're needed on the final night of Toxcatl.
Go to 'Atop the Ipac Tlamanacali' and WORSHIP TONATIU. The priest will say you've been chosen to represent Tezcatlipoca.
Weren't you already?
You will receive the whois ' ...has been chosen to represent the embodiment of Tezcatlipoca.'
Anyway, on April 27 return to 'Atop the Ipac Tlamanacali' and you'll be ritually sacrified and receive the whois and some xp.
NOTE: this is a bit of a work in progress (love Sabs)