Ah also before i forget any good counters to Immortal Sun? :(

NeonEndymion: Hey sorry for the late reply, been working on the plethora of my other decks. I did remove top to slow the game down and enjoy the new toys but have since added it back. Imperial seal is great due to the amount of planeswalkers that can draw me cards so I technically get the card I tutored immediately most of the time. Glad my combo is working well for you!

HighOnBuffs: I would recommend adding at least 4 to 5 answers to enchantment/artifacts if your meta runs immortal sun. I have beast within/anguished unmaking/nature's claim/cyclonic rift/merciless eviction/Urza's Ruinous Blast and a slew of tutors to answer it when the situation arise. Hope that helps!

Just acquired a foil Karn, Scion of Urza for below market value from a friend that cracked it in a pack during draft (I hate his luck). Seems to be a great addition since I run a good number of artifacts which can have Karn make a fatty immediately with his -2. Will be testing him out.

No worries/thanks for getting back to me.

FWIW, I've had a lot of success adding some redundancy to the "draw your deck"/infinite mana combo; I cut Darksteel Plate, Lightning Greaves, and Mana Vault, and Fellwar Stone for Grim Monolith, Power Artifact, Staff of Domination, and Transmute Artifact.

All the suggested new toys from Dominaria have been powerhouses, but I haven't loved Primeval's Glorious Rebirth (often stuck in hand so far). You?

NeonEndymion: You're definitely on the right track in adding redundancies to the infinite mana combo. Since my meta is more casual, I'd try to go the slower route using Atraxa more (hence the darksteel plate and greaves). I haven't seen your list so this is my vague recommendation if you wanna make it more competitive beyond those additions. I would cut down my planeswalkers to the bare necessities required by the deepglow/staff combo to add in more permissions/tutors.

I haven't got to test out Primeval's Glorious Rebirth yet (didn't get to draw it in any games I've tested) but I've often wished I had it due to the nature of my meta which is more aggro/boardwipe heavy. I might end up cutting it if it proved to be lackluster and add in more card draw or something.

That's what I really like about the core of your build: You can tune it up/down depending on the power level and play styles of your local meta, and either way it's fun and splashy without being too fast or repetitive.

In terms of my list, aside from the swaps I already posted, I've tried adding in a light counterspell suite to your current list:

+Mana Drain+Force of Will+Pact of Negation+Swan Song+Flusterstorm

+Enlightened Tutor (for combo pieces)

+Bitterblossom

Cutting: Sorin, Grim Nemesis, Nissa, Voice of Zendikar, Kiora, The Crashing Wave, Ajani Unyielding, Ajani Steadfast, Elspeth, Sun's Champion, and Sorin, Solemn Visitor.

For the time being I'll see how Glorious Rebirth works out as a backup plan; as you well know, untapping with Doubling Season rarely happens, so in my meta at least, the backup combos are necessary to close out games.

Really awesome deck i build most of it now (without ARBUR Duals :P)!

Why do you include Talismans btw? Also any other tips for replacing ARBUR's?

Hope you keep the deck updated its the best and most consistent version ive found in the last year :)

Oh and why did you put Tefferi's Protection out if i may ask?

Ah nvm just overlooked it ;)

HighOnBuffs: "Why do you include Talismans btw? Also any other tips for replacing ARBUR's?"

Talismans are better than signets as they offer the flexibility of tapping for colored mana or colorless without dependence on other lands. I include them as a faster way to get to my walkers as opposed to land ramp spells (which requires a more green mana base to support). ARBURs can be replaced by shocklands, battlelands, checklands, scrylands, and painlands. Hope that helps.

Alright thanks for your insight!

Update: Totally missed Thran Temporal Gateway from Dominaria. Will be testing it out.

Man Dominaria brought so many awesome cards for this deck!

What do you think about History of Benalia btw as a Token Generator, worse than walkers?

Also what does Thran Temporal Gateway do for us?

Is it just there to accelerate a waker like Ugin out faster by essentially paying 4 early and 4 later?

HighOnBuffs: History of Benalia doesn't do much for this deck, I would rather run Bitterblossom over it as it costs less and is easier to cast tbh. Theoretically, Thran Temporal Gateway allows me to play my walkers at instant speed, makes them uncounterable, and "mana fixes" if you don't have the required color to cast a planeswalker. It might be lackluster after testing so who knows?