Vampire Survivors

*Endless?

This guide vastly exaggerates the difficulty of getting this achi', or has bad tactics.
I only had 100 achi's, so a relatively inexperienced Survivor, despite being fully upgraded.
I used the panda🐼 (Yatta Cavallo). All you need to do is run south to the '?' on the map screen - this is Sketamari☠️, a bone snowball. Sketamari rolls east or west, and back continuously, killing everything in its path, growing like a snowball. Just follow it and eventually you're fully protected from its side of the map, even from Death🩻 - I survived 35 mins till the Grim Reaper ('Death') came from behind me and Sketamari. I'd even wasted a weapon getting this, first try, as I got the Knife🗡️ thinking I could kill the snowball thing (you need to kill Sketamari to get the Secrets Menu item - the Forbidden Scrolls of Morbane📜 - but I assumed it was immune after awhile, so it survived).
The Runetracer🔶/NO FUTURE was my most effective weapon during the run, but Garlic🧄/Pummarola❤️ is important early.

NB: I rushed straight to the '?' to see what it was, but you're better off waiting till 10 minutes to evolve a weapon before running to Sketamari, especially if you want to kill it - it's impossible to kill if it's snowballed too large. Standing in front of Sketamari, when it's small, with Soul Eater (Garlic evolved with Pummarola) slowing and killing it, with the Knife firing at it, and NO FUTURE hitting it will finish Sketamari in a minute or so (you won't need its protection at this point). Metaglio Left➡️ (red right-pointing arrow, left side of map) and other items can also be collected without difficulty (although I was using Pasqualina on another run doing that).

Got with Krochi Freeto with Awake arcana, tiragisú, pummarola, hollow heart, attractorb, wings, duplicator and all weapon from marchant, needs to keep moving the entire run, but it works.