THIS DECK IS FOR MASTER RULE 3 PLAY!
If you know how to use Mayakashi's then you're good.
But for those that don't know, here's a quick info.
Mayakashi's work when there's one of its name on the field, Meaning you can't summon two Yasha's on the field at the same time so you're stuck with the one. Also, Mayakashi's work by using their Synchro Summoning method, but make sure you read the effects of the Mayakashi Synchro Monsters and know what you're gonna summon. Also, for the Synchro Summoning method, if you used Dakki for a Synchro, then you're gonna use her over and over and over again for MANY synchro summoning for Mayakashi Synchros, because Dakki gets special summoned if a Mayakashi Synchro monster was special summoned from the extra deck.
This deck also has other cards that'll help special summon monsters from your graveyard, including Mayakashi Synchro monsters to activate their effects to help turn things around if you're low on monsters and you need a wall. Every Mayakashi Synchro monster special summoned from the grave, their effects are activated and depending which you use, they are helpful to get your opponent in a difficult position.
Red-Eyes Zombie Necro Dragon is in this deck that can help because of its effect in gaining 100 ATK and DEF for the zombies in your field or graveyard.
You can add Zombie World field spell but that's only if you want to make the deck become a competitive deck, but seeing I made this for fun, this is what you get.
As for your side cards, you can get some combos if you got Robbin' Zombie and special summoned from the grave Tsuchigumo, the Poisonous Mayakashi.
World Legacy Succession is there incase if you want to use this deck for Master Rule 5 game so it MIGHT be useful for your Synchro monsters in the grave, but I cannot confirm this at this time of typing this description.