Thanks for all the up-votes and interest in the deck you all. And a shoutout to Jambre it looks like this deck was his creation. I did say id make a small guide if this got some upvotes, and it seems a lot of people are struggling to figure this deck out. But it will be brief seeing as the new expansion comes out tomorrow and this deck may be irrelevant by then.
First off ill start with the mulligan, most matchups will be about the same, but it does vary slightly.
The cards you always want regardless of matchup are going to be Palm Reading and Thrive in the Shadows. Palm Reading obviously is going to discount your hand as well as activate Insight which you ultimately want to hit Nazamani Bloodweaver. Which brings me to Thrive in the Shadows With this card you're going to be looking for Insight if you don't already have one in hand or Palm Reading. Insight is also not a bad card to keep in your opening hand if you already have Palm Reading. If not though I would hard mulligan for the two cards mentioned above. Nazmani Bloodweaver, is also a card Worth keeping in your hand if you have Palm Reading already.
Against your aggro matchups Xyrella is a card you want to mulligan for as well, insight is also another card to keep or mulligan for to help you find Xyrella or Nazmani Bloodweaver Against hunter i tend to keep Holy Smite if i already have it to deal with their strong 1-drops: Arcane Anomaly Intrepid Initiate. Against druid i also tend to keep Shard of the naruu to deal with their early snowballing cards, like Composting
This decks worst matchups are OTK demon hunter and quest warlock (specifically the giant version) like someone mentioned below. But neither are unwinnable if you get your combo pieces early.
This decks best matchups are Aggro druid, pirate warrior, and Hunter. Which also happen to be the three matchups I have played most.
Once you have the main pieces in hand ideally around turn 4-6 (can still work at later turns) The general concept is having your hand discounted from Palm Reading you play your Nazmani Bloodweaver duplicating it immediately, if possible, withGift of Luminance or Psyche Split then using your cheap or free spells to discount your higher cost cards Such as Elekk Mount, Malygos or whatever cards you may discover as you're going off from Renew or Draconic Studies. And then duplicating the card you've played Elekk Mount on with either Psyche Split or in some cases Gift of Luminance. Typically, once you've done this or something similar you are back to nearly full health and the match is for the most part over.
If you want an even more in-depth walkthrough of the deck Jambre, the creator of this deck posted a good video going into more detail that a couple people have linked below, but i will also link here:
I hope this helps some of you out, I know it's not the most straightforward or easy deck to play, but trust me once you get it, it's very fun. Good luck to all of you on ladder!