This deck probably looks incredibly terrible. To be honest, it probably is, because this is a very rough draft. Any suggestions are welcome.
The basic premise of the deck actually did not start with Dream Halls, but someone musing as to whether or not Jin-Gitaxias was playable. At first, it seemed obviously unplayable. Certainly too expensive to hardcast, not tinkerable, not as good a reanimator target as Sharuum + Possessed Portal in dredge, not as good as Iona or Emrakul or any number of other creatures in oath, etc. The only obvious pros are that it pitches to Force of Will and has flash, both of which are pretty minor advantages. It was only when I re-stumbled upon Dream Halls that I started to see the neat interactions: you refill your hand every turn and cast everything for free, and you strip your opponent's ability to take advantage of Dream Halls at all, which most decks are less prepared to utilize anyway.
The core of the deck is Jin and Dream Halls. I think that Erayo offers a lot though, and has the advantage requiring the deck to run fewer answers. Top/Magus and Intuition as the main sources of draw, and Magus has good synergy with the rest of the deck, but they aren't required either. As I said, the deck is in a purely developmental stage right now.
Below is the current decklist. Any suggestions, criticisms, or questions are totally welcome and appreciated!

Artifacts (11)
1 Black Lotus
1 Mana Crypt
1 Mana Vault
1 Mox Emerald
1 Mox Jet
1 Mox Pearl
1 Mox Ruby
1 Mox Sapphire
2 Sensei's Divining Top
1 Sol Ring
Creatures (12)
3 Erayo, Soratami Ascendant
3 Jin-Gitaxias, Core Augur
3 Magus of the Future
3 Teferi, Mage of Zhalfir
Enchantments (4)
4 Dream Halls
Instants (16)
1 Ancestral Recall
1 Chain of Vapor
4 Force of Will
1 Hurkyl's Recall
4 Intuition
1 Mystical Tutor
4 Spell Pierce
Sorceries (2)
1 Merchant Scroll
1 Time Walk
Lands (15)
7 Blue Fetches
7 Island
1 Tolarian Academy