Easily my most involved and maleable deck list; The main idea is that this deck has two "core" presets and one is stored in the side deck while the other is main decked so you can turn the game on its head between to keep you opponent guessing. The cores in question are (you guessed it) Eldlich control and Mayakashi. The rest of the deck is built on a zombie synchro/control engine (so obviously its geared more toward Mayakashi) but the eldlich part is consistent enough that it will mess with your opponents head when you pull it out.
The Eldlich core is 15 cards:
1x eldlich, 1x samurai skull, 2x cursed eldland, 1x zombie world, 1x called by, 3x conquistador, 2x Huaquero, 3x eldlixir, and 1x necro dragon (extra deck)
Very basic eldlich play and you don't need to use the extra deck very much so I almost added dogmatika punishment to the list (maybe an idea for the future), but it gets the job done. Looking at the eldlich side ins and whats different from how this deck plays the mayakashi side ins, we add an extra eldlich to up his consistency without compromising the spell/trap ratio as well as running an extra samurai skull to balance discard power after removing yuki musume and also an extra zombie world to up the consistency of the zombie world/rivalry of warlords lock. Finally we side out a tengu and replace him with zombie necro dragon because you may need that extra beat stick power and its one of the few synchros we can still make under these circumstances.
The mayakashi core is everything in the side deck
Its just normal Mayakashi play: search Dakki as fast as possible and climb the latter, end on Yuki-Onna (link 4), Gashadokuro, Dakki, and then hopefully a copy of the trap or maybe even a zombie world/rivalry lock. For a more in depth explanation of how basic mayakashi is played, most other mayakashi deck profiles will have an answer for you
Finally, lets talk about the engine:
The engine can be divided into 3 main parts: generic zombie stuff, negate, and anti-brick
The negate is exactly what you think it is; Ash blossom, Ghost mourner (or whatever other zombie hand trap you want to run there), and mazera
The anti brick is eldlich, bolan, and arguably samurai skull. Eldlich will discard spells and traps so you don't brick, bolan (by far the best anti brick in the deck) will discard excess monsters so that you can get at least one or two blockers on the field, and sam skull can put something in the grave, wether that be eldlich, balerdroch, spectralsword, or (my personal favorites), necroworld banshee or glow up bloom. Off bloom you can get an eldlich, balerdroch, or bolan to hand and off banshee you get a zombie world on field, but keep in mind you've already used your normal summon on samurai skull.
The zombie world stuff is everything else I haven't talked about yet: a couple tuners, some grave special summon from mezuki, rivalry, and also fun trap removal.
This deck IS NOT EASY by any means, but if you practice and learn how the cards interact, and start to understand how combos flow together, you can outplay pretty much any deck (even Kashtira and Tear, I know because I've done it myself). This deck is hard but rewarding, and bricks are few and far between.
Happy dueling
-Ornge