I own every card on this list except Timetwister. What would you suggest replacing it with?

Time Spiral. The recursion is relevant sometimes.

Sorry if this is a dumb question, but why not run Krark-Clan Ironworks. Cast all your rocks....sac them all, Yawgmoth's Will, recast...up storm count and most of them cost nothing or pay for themselves. Net mana, net storm count.

Is there a reason Snapcaster Mage is excluded? Were you finding it just not doing enough for the storm game plan to warrant an inclusion?

Krark-Clan Ironworks sounds stupid enough to actually work. The deck doesn't really have that many 0 or 1cmc artifacts so it doesn't really turn things into rituals even though it does one-shot a lot of mana if I get it down. The cost of 4 mana, only working with Yawgmoth's Will and being quite dead otherwise makes me thing it's not that good.

Snapcaster Mage is a card I just find lacking. Paying 2 extra for a tutor or a wheel mid storm turn is terrible and for the grindy games I think just running an additional counterspell or gas card is better. I think there are better cards the deck cound run.

Recently became interested in trying this deck out, curious as to the exclusion of cards I would have previously considered 'staples' to this archetype, such as Intuition / Past in Flames. Also wondering about the inclusion of Aetherflux Reservoir but not Paradoxical Outcome? Are these 3+ CMC cards just too clunky in the competitive meta?

Intuition is kinda bad without Past in Flames, it fuels YawgWin lines well enough but those would require you to actually have the YawgWin in hand. Outside them I've never been that impressed with Intuition, a 3 mana instant tutor that can't be used to get the best cards like Nauseam or Doomsday or Notion Thief isn't super exiting. I've even thought about cutting Grim Tutor just because 3 mana for a tutor is just so much mana.

Past in Flames is just a bad Yawgmoth's Will, drawing either usually doesn't feel good but not being able to do LED shenanignas with Past in Flames plus the costing 4 made me cut Past in Flames. I haven't missed it, if I want to tutor the effect YawgWin is just strictly better.

Thanks for responding so fast! How useful have you found Jace, Vryn's Prodigy? Also still curious about Paradoxical Outcome, when I was goldfishing it seemed to usually be a sort of combination turnabout / wheel, providing additional storm count, mana (through net positive rocks / re-using candelabra) and card draw. Have you considered it at all or again is 4 CMC just too much?

JVP has been underperforming to be honest, not being able to loot the same turn + digging only one card deep is not that strong, and the flashback too is rarely exiting, just okay. I've cut it from my most recent list but this one's unchanged since I'm playing in the /r/competitiveedh tournament and I'm not allowed to change it because of that. Baral, Chief of Compliance is the new spiciest tech I'm testing.

Paradoxical Outcome is just too fat, it's almost like a strictly worse Hurkyl's Recall. It doesn't do double duty as artifact removal, hits for 4 from nauseam and drawing cards while good is either not going to be that relevant on the combo turn and on a non-combo turn the deck rarely has enough rocks you want to bounce for it to be good. I'd play Retract before Paradoxical Outcome but I don't think the deck wants two of the effect, you do moderately often tutor for Hurkyl's for Desire lines and stuff but those happen when you've notionwheeled or naused and it's possile to tutor for Hurkyl's.

Hey dude, love the list, it's giving me a nice launching point into grixis with leovold doomsday being my main deck. One question for you, i noticed that you opted for a lot more of the fast mana rocks whereas Moxnix's version goes higher up on the curve with gilded lotus and mind over matter. Do you feel that the lotus into mind over matter line is just too clunky with Isochron? Also, being that I play solely paper magic, and Candelabra and Timetwister are just out of the budget at the moment, what would your recommendation be for a substitute for those 2? I know how important Candelabra is for high tide but is there a way to play high tide effectively without the candle? Thanks dude!

cEDH decks have become so much faster and more consistent that going as high on the curve as Moxnix with Gilded Lotus and MOM is just wrong, you never want to see those cards in your hand when going against Selvala or FCT or something. MOM as a line was just pretty win-more, if you're able to hit 6 mana on your Nauseam turn there's most likely some other line available that leads to winning the game. Lotus is just bad.

Candelabra isn't in fact that important, it's nice to have since there's actually a lot of little synergies it offers. It fixes mana, makes mana with Ancient Tomb, is funny against Winter Orb and of course the High Tide synergy. Overall it's not that needed though and can be replaced with an additional rock or an interaction spell or a gas card or something. Timetwister is hard since the card is just super good and the recursion is actually pretty relevant. You still do want the effect so I'd just slot Time Spiral back as a replacement.

Would you ever seriously consider bubbling muck as a "second high tide" in the Candelabra slot? It combos decently well with urborg, though I really like having another gas card as that's the big issue I find myself having.

No, the deck doesn't get enough swamps into play consistently that it'd be better than Rite of Flame most of the time. I'd play even Rain of Filth before Muck. Plus I'm not even on urborg, and if I were spending a tutor for it to get Muck online would never feel good.