Most time consuming spells to resolve in the format?

[DirkGently]

Just for fun. Came up in a game last night when someone played Eye of the Storm.

Off the top of my head, I'm thinking Scrambleverse or Thieves' Auction perhaps?

[Dunharrow]

Mind's Desire can be long - You are supposed to shuffle between each resolution. Normally, we shortcut this as a shuffled library is randomized and assumed randomized for reach resolution of MD...
But if you have a card that shows the top card of the library, like Future Sight, then you need to shuffle each time. That can be long!

[Toshi]

Villainous Wealth can take absurdly long to resolve.
In most games, we just checked if there were enough game-winning pieces and shuffled up.

[Mookie]

The very most? Yeah, probably Thieves' Auction or Scrambleverse.

As for other cards that take a long time... Primal Surge (assuming people don't just concede) and Radiate can both lead to long actions. Twilight's Call / Living Death can also take a long time, assuming stocked graveyards with lots of creatures that cause triggers.

Goblin Game can take a while if people try to math it. Bribery and Praetor's Grasp effects can also take a while.

[Ruiner]

Chaos Warp hit with Radiate. I've only seen it once and just scooped to avoid trying to resolve that on a big board since every player has to shuffle in between every iteration of Chaos Warp that goes off.

[Hawk]

I scooped to an opponent resolved Scrambleverse - talk about an unfun, and tedious spell.

(he says, as he dredges Life from the Loam back to his hand to cast it for cycling lands to cycle to dredge back LftL for the third time this turn...)

While not a spell, I realized recently that having multiple stations out in an artifact-eccentric deck (I had both Blasting Station and Salvaging Station active in my Sai deck) is also really really brain-smoothing. I was <a few months ago> years old when I realized they trigger off of ANY creature EtB or dying, not just yours - which adds up to levels of "in response, trigger..." that would make Rhystic Study blush.

I'll also second tutors, especially broad or opponent targeting tutors like Bribery, as stuff that takes an inordinate amount of time.

[cryogen]

Hive Mind

Not necessarily because it causes any single action to take that much longer, but EVERYTHING takes longer. I took a turn a couple of weeks ago that would have normally taken maybe 10 minutes to resolve and instead took over an hour due to resolving everything.

[Hermes_]

Warp World depending on how much is out on the board

[Serenade]

I think you all named crazier stuff, but I'll just add Rise of the Dark Realms or Command the Dreadhorde or another big resurrection spell late game since everything has ETB effects.

[Legend]

Dimensional Breach isn't complex but sets up quite the delayed trigger.

[DirkGently]

Since no one has mention it yet, Grip of Chaos makes the game take waaaaay longer. That or people just never cast targeted spells.

[Mookie]

....the most excruciatingly slow game I ever participated in involved a chaos deck that played out Hive Mind + Eternal Dominion, with Grip of Chaos and Confusion in the Ranks out. It was a three player game, but each turn cycle took so long to finish that we called it a draw after just a few rounds.

[RxPhantom]

I was just about to start a topic like this! Great minds and all that, Dirk.

Anyway, I put Clone Legion into my Yarok, the Desecrated deck thinking it would be big, fun and splashy, but holy crap. It. Was. Stupid. I had a full board of ETB-effect-having creatures. Triggers upon triggers that triggered other triggers.

Apex Devastator has been similar in my mono-green stompy deck. If I have something like Garruk's Uprising on the board, or cascade into stuff like Rishkar's Expertise, it becomes very easy to lose my train of thought and forget where I am in the cascade gravy train.

Mind's Desire can be long - You are supposed to shuffle between each resolution. Normally, we shortcut this as a shuffled library is randomized and assumed randomized for reach resolution of MD...
But if you have a card that shows the top card of the library, like Future Sight, then you need to shuffle each time. That can be long!

That's the first time I've ever seen that card, and it can go to hell and die.

[Krishnath]

Warp World depending on how much is out on the board

How about around 70-80 slivers? Because I had a deck that basically won that way: Set up the Sliver Queen infinity engine (Heartstone and Ashnod's Altar), use it to end up with 70 to 80 slivers. Cast Warp World. Win. Unless your opponent can stop it, it wreaks havoc with their boardstate to such an extent that you should win easily. Particularly if you have in cards like Harmonic Sliver and Necrotic Sliver in your deck. When the whole thing is over, you just cast the Sliver Queen again, make a bunch of tokens, and attack all your opponents at once for boatload of damage. Even if they can somehow stop the damage (like with Fog, but who plays that in commander?), you just keep hitting them, because they won't be able to mount much of a defense.

[knight_seb]

Every spell bringing a lot of permanents and resulting ETB triggers could correspond to this criteria : Genesis Wave, Villainous Wealth , mass reanimation spells, etc ...

[folding_music]

more subtle, but there's stuff like Ill-Gotten Gains, Scheming Symmetry and especially Flux! I've never seen a simpler card cause so much calculation and agony, people start looking at their hands like they're playing a serious game of poker.

[materpillar]

Soulfire Eruption also takes a while to resolve if you target literally everything (which you probably would).

[Hermes_]

The first time,it took a while to resolve was Thrumming Stone with Relentless Rats but once we realized that if you hit three rats in a row,i'd end up with all of them out,so we cut the time down for that.

[TheAmericanSpirit]

Dimensional Breach isn't complex but sets up quite the delayed trigger.

Holy smoke, that's a wicked card. Never knew that even existed.

[PrimevalCommander]

The King of time monopolization Sensei's Divining Top

Genesis Wave takes some time more due to stacking ETB triggers, as many other cards. Warp World as well.

Tutors take time, and the less experienced the player, the longer tutors take. Though I have been known to throw out a Recruiter of the Guard with not much plan on what to search, but the restriction makes it a touch easier. If I have a vamp tutor in hand I'll save it until I know what I want. Otherwise, why cast it.

[Serenade]

Tutors that take the longest are when you think you added a card to a new deck and only when searching discover you forgot it. =P

[Dunharrow]

Tutors that take the longest are when you think you added a card to a new deck and only when searching discover you forgot it. =P

Or when you didn't remember you cut the card!!

[Krishnath]

Tutors that take the longest are when you think you added a card to a new deck and only when searching discover you forgot it. =P

Or when you didn't remember you cut the card!!

Or when you are looking for that hail mary play that will save your ass for more than one turn.

I actually managed to do that once, and in record time too. It was down to me and an opponent, he had milled me down to less than 20 cards in my deck, I drew my card, and it was an Artisan of Kozilek, I played it, got Rune-Scarred Demon, used that to get a Rite of Replication, used it on the Rune-Scarred Demon with Kicker, fetched the remaining four lands in my deck and an Altar of Dementia, played it, then sacrificed my entire board to mill down my opponent to 1 card.... said go, and my opponent promptly died as a state based effect due to there being a Howling Mine in play. Good times.

Edit: For clarification. I only played one of the lands I fetched. The other four cards weren't important, the Altar was. The Rite was to ensure I had enough power on the board to pull it off.

[toctheyounger]

Surprised no one has mentioned Living Death/Living End. Assuming 4 players in the game and reasonable amounts of bodies in 'yards, and also given how value ridden creatures are these days (read: ETB's) it can take a hot minute to get clarity on the board state upon resolution.

[Zerro]

I used to run The Great Aurora where ever I could though it got to the point to where i was tired of resolving the spell and so i ended up taking it out of most of my decks. Token decks with this typically take the most time followed by "What do i put into play again?"