I got a mystery brew thing from the daily login and it gave me zolnixi talismans, but I am not sure what this means or does. I also can't see it now after opening the mystery box. Can someone please help?

See: Fall Festival Overview
See: Sylesti Brewing

Zolnixi Talismans are what is called a 'Catalyst' used to create one of the fall themes- in this case, Forest Sunset Zolnixi (I assume; the other option is that it was Spectral Glow Zolnixi catalyst, the Aged theme (was new last fall fest, and retires as a createable theme when this fest ends))

You can see the Catalysts that you've acquired from catalyst boxes on the Sylesti Brewing page.

To make a themed pet using a catalyst, you purchase a Cauldron, put in the desired catalyst, and it will eventually be ready to collect.
Every... I'm going to go with 45 minutes (as a guess, but somewhere between 30 minutes and 1hr10minutes (it depends on the festival)) a brew will want a brewing agent (obtained from Brewing Agent boxes) added to fix its condition (3 different conditions, 3 different agents) and improve its Quality, as well as increase its progression and speed it up (brews do progress on their own slowly, but it takes 288 hours (12 days) if entirely untended)
If Quality is kept up enough, you get a Bonus (there's 2 bonuses total per brew; with regular and Fabled themes, bonus 1/2 is extra stats, 2/2 is a random bonus carry. Majestic themes' 2/2 bonus is a second stat boost)

You can add a Blood Vial to a brew to give it visible traits. These do not stack- a higher tier Blood Vial just overwrites a lower tier one (with reg+fableds, Lesser Blood Vial will give a brew 1 vis, Greater, 2v, Exceptional, 3v. Majestics get 2c for a lesser, 1v from greater, and 2v from exceptional)
The traits of regular and fabled brews will be completely random (save excluding all Restricted traits.) (Majestic brews on the other hand can only have traits of their specific trait set)

You can select the gender of the resultant pet by adding either Sugar and Spice (female) or Gummy Puppy Tail (male)

You can get bonus stats on the pet using Spectral Essences

Sticky Goo lets you lock in specific trait slots (but not what trait from that slot)
Vampire Dust will add a recessive Hidden under a visible trait (selected at random)

I won't lie, that sounds complex as hell...thank you though I do always appreciate the explanations!