Puschkin

Vanquisher's Banner could be cut for example. You have 21 creatures and only 13 of them are actually walls, so the banner isn't all that useful. I'd also rather have a backup like Assault Formation than something like Brave the Sands that is only useful if everything else is in place. And then there is your heavy focus on planeswalkers like Steady Progress or Oath of Teferi, cards that have no synergy with your commander or main theme of the deck.

No Assualt Formation? That should be an auto-include!
Also, check out Tower Defense! You won't get a better deal for just two mana ...

Maybe Meekstone?

Haha, that sounds so like you :)
Still in danger of losing the house!?
I haven't managed to visit you yet ... which is getting increasingly difficult because I have a spawn now and he is very incomplete :)

Well, I was asking for the most versatile cards you can think of. Something like Daxos which gives you access to cards outside of your deck each turn while dealing damage AND gaining life. Those are hard to find (unlike Insidious Will or Charms), hence my request. When you think about versatility, something that can be useful in countless situations, what pops up in your mind?

Heya, anyone still around?

This time I ask you: What's the most versatile, universally useful cards you know for multiplayer?
Asking for this baby:
https://www.mtgvault.com/puschkin/decks/keep-forever/

Does every creature need to be a wall? You could seriously improve the deck if you ran something like Perimeter Captain instead of weak walls like Coral Barrier.

What's Zephyr Net or Aurafication for!?

The lack of any removal and other utility is also worrysome.

It's like you just made a database search for the word "wall" and added cards from the result list until you had enough ...

Try the take out ;)

No Su-Chi!?

Puppet Strings! Either tap opponent's creatures so you can assassinate them or untap one of your assassins to kill another one! It's also harder to kill than Rathi Trapper (who isn't an assassin anyway).

Since the deck is Vintage/Legacy now, you could upgrade those Distress to Hymn to Tourach.

And I recommend a Bojuka Bog or two replacing Swamps. They may work against Mortivore but there are so many creatures out there that come back from the grave or do other nasty things from the grave that I think graveyard removal is a necessity, especially in a deck that focusses on creature kill.

Well, I was very conervative when trading and never stopped playing. Also, tinkering with existing decks and updating them from time to time is more fun for me that building the newest gimmick deck everyone else does.
That and in many cases old cards got outdated by more powerful cards, why would you need a Sol Grail if you could have Darksteel Ingot instead? In this case, nobody every wanted to trade for my Uncle Istvan and that's how he ended up in my deck.

I think you can't. I also think nobody cares :)

No Leveller!?

P.P.S.:
Or better yet: You upgrade those Utopia Sprawls to Weirding Wood :)

P.S.:
a) forget about Mystic Snake, it has double blue, too :P
b) If you add Guided Passage you might want to replace those Utopia Sprawls with lands

I like this deck and the various choices!

* But again I think the creature count is kind of low. As with some of your other decks you run a tad bit too many creature enhancers for too few actual creatures. I know that this list is 58 cards but even if you add two more creatures it's still kind of low. Suggestions:
- Hull Breach could be replaced with something like Indrik Stomphowler, Acidic Slime or Trygon Predator.
- Cut 1-2 of the least useful enhancers. For example I like Samut, but he does nothing if you have no creatures.
- Cut the Savage Summonings. They are good cards but you still have the Rythm of the Wilds to combat counterspells.
Possible creatures for the open slots (there are of course hundreds of candidates):
- Jugan the Rising Star, Cockatrice, Horizon Chimera or Silklash Spider (you lack flyers)
- Dragon Lair Spider
- Khenra Charioteer
- Forgotten Ancient
- Wilderness Elemental

* I think this is one of the few decks where Guided Passage would be a great card. There is no "safe" option among the creatures, you either get a nasty creature or a smaller one that will get you additional cards. Guided Passage would be better than Signal the Clans amd Impulse. I do have a playset that I am not currently use, I can borrow them if you want.

* You are dangerously low on land with just 20. You do have Utopia Sprawl, the Lantern, Domri and Guilded Lotus. However, I think Guilded Lotus is too expensive for this deck. If you are stuck on 4 mana you can't cast the Lotus. Maybe use something cheaper like Darksteel Ingot or Sol Ring instead. Maybe even another Land.

* Take Possession is a good card but blue is a just a splash in this deck and Take Possession costs double blue. Also, while it has split second, the opponent can just disenchant it later and get his stuff back while you invested so much mana. So I think it's not worth the trouble (in this deck). Mystic Snake instead?

Let me add that nothing of all of this is urgent, this deck looks quite good as it is. my suggestions are mostly Kleinigkeiten :)

You should play this more often - haven't seen it since you made the changes and it looks good now!

I think there is a mismatch of haste enablers and creatures that can benefit from it. 4 Fervors + Unabrask + Hammer + Anger = 6 cards that provide haste for all of your creatures. But you run only 13 creatures and 8 of them have haste already :) Also, both your god and Savage Beating require you to have lots of creatures. You can easily replace at least 2 Fervors with more creatures. Keep this in mind when reading the next suggestions.

Your weak spot is enchantments. The default way to handle this in mono-red has always been Nevinyrral's Disk. I think it fits this deck quite well because it doesn't have many permanents, the planeswalker isn't hit, the god is indestructible, the phoenixes come back with the red spellt, Anger wants to be in the grave anyway etc.

I would replace either Shatterstorm and/or By Force with Builder's Bane because it triggers the Phoenixes. You might also consider using Hoard-Smelter Dragon to kill artifacts, which would up your creature count.

I remember you said you added the Devils because you want one-drops. You know our arguments against them in multiplayer. The problem is the lack of quality one-drops for mono-red in multiplayer. However, there are a few cards to consider:
- Elixir of Vitality keeps you alive and recycles cards
- Pyrite Spellbomb: early defense that can be used later and has the option to replace itself if you don't need it
- Molten Vortex
- Grim Lavamancer
- Figure of Destiny (useful in every stage of the game)
- some of the cards in your sideboard like Glaring Spotlight

You worry about one-drops but don't have any 2-drops besides Armillary Sphrere ;) There are plenty of good ones, way too many to write them all down. Here some examples for cheap creatures that stay relevant in longer multiplayer games:
- Dismissive Pyromancer (might replaces Magmetic Insight)
- Ash Zealot (good early on and annoying for many decks later on)
- Ashling the Pilgrim
- Stigma Lasher
- Keeper of the Flame

I would replace Chandra's Fury with Cerebral Eruption. It cost one less mana and will deal either as much damage or more more to the opponents ceatures (which is more important than the damage dealt to the player).

I like the general setup of this deck and the cards like Burning Earth. Keep the framework.

They are all 5+ mana and with the exception of the most expensive ones they are all vanilla besides the cycling. So, while I get a slightly more stable mana production, I will go up the mana curve AND lose abilities. I can't afford to play vanillas instead of something like Rampaging Baloths. I might if i had some sort of reanimation going but alas I don't.
Besides, none of them accelerate. Even Krosan Tusker doesn't put the land into play, only into my hand.

Nyktos might be an option.

You might want to have a look at Life Chisel.

"The krrog are freaking bad lol but if I drop the number of artifacts too low, I feel like I'll have a bad time playing living artifact which is indeeed much better! "
=> Yeah but my suggestion was to replace with Ivory Tower (also an artifact ;) )

"The ifh-biff was there to lower the CMC as a replacement for triskelion which was more suited to the deck but with a high casting cost! "
=> Yeah, but again, don't you mean SERENDIB EFREET instead? He is even one mana lower and does ping you every turn, seems like an natural fit.

"The mind bomb was there to avoid being overrun by creature by making opponent discard a lot!"
=> That makes no sense. They can discard whatever they want and they can decide to not discard at all and just take damage. And the latter is what every player worth his salt will do. Unless of course they have something like Animate Dead, then they will discard their biggest guy, animate it and thank you.

"Ivory tower would be awesome, but the deck is quite cheep, so I don't feel I would hold cards long enough to gain life! Maybe find room for healing salve or instill energy to either gain some life or have people lose more."
=> Well, first off, nobody forces you to play stuff. With a Tower out you only play a land each turn, if at all, and keep raking in life until you are forced to do something. Secondly, of course, I was assuming that you ditch stuff like Mind Bomb and Psychic Purge ;)

"Maybe veteran bodyguard could help me more in this deck, replacing the efreet. Would cover all life lost by mind bombs or copper tablets. I even thought about ditching the ifh-biff for fungusaurs haha"
=> now we are talking! Yeah, do that. And don't forget Martyrs of Korlis.