I have started playing HS about half an year ago as a F2P player so I mainly focus on decks for which I already have the cards - the budget version of this deck is about 1400 dust.
Thanks to @kiwiinbacon, you can check how the deck performs at R5 in the video below.
This deck started as a OTK Priest using Divine Spirit and Topsy Turvy but then I though that the latter has a great synergy with Marin the Fox. So I included him as another win condition. Basically you can play Marin the Fox and break the Master Chest on the same turn - 8 or 7 with the coin.
Zerek, Master Cloner is not mandatory but he has synergy with all of the buffs - Power Word: Shield, Divine Spirit, Extra Arms and even Topsy Turvy. If I didn't have it, I'd rather put a Crazed Alchemist on his place or an Acolyte of Pain. The best part is that he plays role as a soft taunt - people always tend to destroy him as a first priority threat leaving your other minions unharmed and ready to be "activated" by the combo.
You should ideally aim at having some low mana drops in your starting hand - a Northshire Cleric or Radiant Elemental which could get buffed immediately so that you can control the board. After that the main goal is to draw as much cards as possible while maintaining the board control until you get some pieces of the combo - big enough minion buffed by magnetizing stuff one to another and having a Divine Spirit and a Topsy Turvy in hand.
The best part is that many opponents will try to immediately get rid of the Northshire Cleric or the Radiant Elemental and after you play a dumb 1/5 minion for 2 will feel less threatened and forget the potential that could you be pulling of these harmless minions.
Mass Dispel is so good that I decided to run two copies. It is so versatile - it can be used defensively and offensively but it also draws you a card which brings you one step closer to finishing the game.
Marin the Fox honestly is here for fun but he did won me two games because he did generate much value.
Edit 1: Thank you all for the support and especially Kiwi for making the effort to prepare a video showcasing the deck.