So many zuberas dying, so many abilities activating, so many zuberas undying, so many zuberas dying, so many abilities activating, so many zuberas undying, so many zuberas dying, so many zuberas....
Use all the mana ramp to get out a wall of zuberas, then play a Shirei, Shizo's Caretaker and turn them into endless undying sacrifices with crazy effects the more you kill at once. Cards like Floating-Dream Zubera, Immortal Servitude and Evolutionary Leap keep your field and hand full, while cards like Devouring Greed are a super easy game enders/extenders, especially with Dripping-Tongue Zubera's spirit tokens. Or just keep dealing damage with Ember-Fist Zubera as your hilariously impenetrable zubera sacrifice wall grows ever larger.
All for under $30. How can you not go make this deck immediately? I always enjoy playing with this deck.
There are certainly less budget options available for this deck that would improve how it plays, and I've added these options to the Sideboard. If you have suggestions, please comment and let me know.
Early Game
Early game basically consists of getting Cryptolith Rite into play until you have enough land to use the Zubera's themselves as mana. City of Brass also makes this easier, if you choose a slightly less non-budget version of this deck. Don't be afraid to sack a few Floating-Dream Zuberas to get a card advantage either, you can get them back later. Then get an Evolutionary Leap out, where you can use zuberas as both the mana source and the sacrifice to get more zuberas into your hand quickly and activate their effects.
Midgame
Get your field ready with as many zuberas in play as you can manage, then drop a Shirei, Shizo's Caretaker onto the field and watch as all of the zuberas become invincible endless sacrifices. Bolster your field with anything in your graveyard with Bloodbond March and Immortal Servitude, and just keep sacrificing to your heart's content while dealing hand loss/damage to your opponent and gaining life/cards/tokens yourself. The less budget Collected Company option also helps this field ramp considerably.
Use Devouring Greed, Plunge into Darkness, and Silent-Chant Zubera to rocket your life points above having to worry in the meantime while you setup for your coup de grace.
Win Conditions
All damage dealt through this deck either comes from Ember-Fist Zubera, overwhelming Dripping-Tongue Zubera tokens, and the incredibly nasty Devouring Greed. Board-wiping sacrifices are what wins this deck games, and it's relatively easy to do in this deck, especially when you consider Devouring Greed only needs 9 spirits sacrificed in order to directly deal 20 damage.
Combo a self sacrifice fest using Evolutionary Leap with Immortal Servitude to bring them back, and then a Devouring Greed to quadruple the Zubera damage, then Shirei, Shizo's Caretaker brings your sacrifices all back into play (if your opponent somehow survives the turn).