Another suggestion that might worth include in this deck is: Invasion of Ikoria  ^Flip, a tutor or recursion on the front and a wincon on the back to make all our defender unblockable.

What about Rite of the Dragoncaller, Frontline Heroism and Divine Resilience ?

Divine resilience would be a reusable mass protection since it target.

I continued to dig for cards both old and news, that are not listed here but could fit:

• Gift of Immortality : This card has lot of potential, i think this card has been glanced over because if you're not careful you don't realize it's every end step and not only yours. Even if used on a one mana afterlife 1 fodder, in a turn rotation of a 4 players game it would already have payed for itself (4 recursion of 1 mana creatures for 3 mana). In this deck it's like a better version of Ophiomancer. Others awesome targets would be Market Gnome, Ranger-Captain of Eos, Elenda, the Dusk Rose, Hallowed Spiritkeeper, Kokusho, the Evening Star (for those that play it like me). Or can be used as a protection for sacrifice engine, a draw engine, a blood artist effect or Teysa. With flash or an ability to chose of make it comeback to your hand instead of attached to the creature i think it would be a no brainer.

• Crowded Crypt : both a ramp and a payoff cards, with Teysa and a one mana afterlife 1 fodder it's already 6 corpse counter on the Crowded Crypt, a few other sacrifice and it's a winning condition. I know it's a 3 mana ramps but it's very fitting in this deck and a ramp.

• Bartolome del Presidio: another free sacrifice engine for 2 manas, but personnally i would prefer using Warren Soultrader and Viscera Seer.

• Reliquary Monk: An interesting removal, i almost find it better than Cathar Commando since with Teysa it's a double removal. Of course the downside are the 3 mana cost that can't be splitted over time like Cathar and flash missing.

• Funeral Room / Awakening Hall: another blood artist effect, with a recursion ability later, but you already haven't included The Meathook Massacre. Personnally i'm almost at a point where i'm ready to remove Blood Artist since it's the last effect that target a single player instead of dealing damage to each opponents, it's only upside is that it also work with opponent creatures dying.

• Kambal, Profiteering Mayor: It's a mix of Corpse Knight and token making. I'm not a fan of "this ability triggers only once each turn" and "one or more token" instead of "a token". Although a lot of people include it in their lists, i have mixed feeling about this card.

• High-Society Hunter : a better Grim Haruspex since it also work for other players but still 5 manas, i would not include it.

Azeure Arcades is a deck that you can upgrade over time when new defender are released. The first version i built based on K4m4r0 version didn't have all the defenders release the lasts 5 years.

Regarding MDFC indeed it's a great way to increase the land density, i would not replace one of the 35 land by one but instead having 35 lands + 1-2 MDFC .

Bala Ged Recovery  ^Flip, Sink into Stupor  ^Flip, Witch Enchanter  ^Flip and Glasspool Mimic  ^Flip could also be considered. But personally i wouldn't know what to cut to add them. But i would love a MDFC land on a Bar the Door effect.

Masterful

Do you plan to make a new update ? There is lot of new cards to review since the last one 12 month ago, several of which would make the cut in the deck as mentioned in previous comments.

Aldo, in cards not mentioned before but probably too expensive as a 5 mana drop, Valkyrie's Call make a good impression of Luminous Broodmoth.

Azeure To be honest there is plenty of redundancy that we don't play:

• Assault Formation
• Walking Bulwark
• Bedrock Tortoise
• Rolling Stones
• Huatli, the Sun's Heart

The only one worth running for me is High Alert because it does both "every creatures with defender may attack" and "they assign combat damage equal to their toughness" for every creatures without having to pay mana to apply the effect.

The second best one for me is Assault Formation but i still cuted it. Bedrock Tortoise is almost playable, if either the hexproof was not conditionnal to your turn or if it's mana value was 3 instead of 4.

For 3 mana we usually have 0/7 defender without abilities Glacial Wall / Wall of Ice or 0/6 with abilities Hover Barrier ( i don't take into account the 2 very good 3 mana drop that are Wall of Denial / Weathered Sentinels).

So now let's review Plagon, Lord of the Beach, Plagon is only a 0/3, don't deal damage equal to it's toughness without paying 1 extra mana each time, it's doesn't draw us a card with Arcades and it's ability only fufill one of the 2 needed condition for redundancy as explained above. I agree it could draw us lot of cards, ranging from 2 to 5-6. If we didn't had draw engine in the command zone i would say it worth it, bu since we have one i don't thinks it's necessary.

It's already very hard to find room for each new creatures cards, i'm already having hard time finding room for Crystal Barricade and consider removing Brave the Sands from my deck. A 3 mana creature has to be really really good to make the cut in Arcades now, and i don't speak about 4 mana creatures. I'm still on fence regarding Corrupted Shapeshifter since the only 4 mana creatures i play are Arcades, Sidar Kondo of Jamuraa and Tree of Redemption, and i wonder if i would not rather include Towering Titan instead as another wincon.

PS: My decklist if you want to have a look

K4m4r0 Of course the new Crystal Barricade is a nice addition to the deck to protect yourself against combo, and your creature from Blasphemous Act effect.

I also see that you never added Flumph, which can be a pretty good political card.

New things to consider as sac fodder Indebted Spirit, Infestation Sage, Wriggling Grub (this one is an instant must have). Blasphemous Edict as a boardwipe.

You should cut Myr Sire, Martyr of Dusk, Carrier Thrall and replaced them by Indebted Spirit, Infestation Sage, Wriggling Grub.

Personnally i would also replace Priest of Forgotten Gods by Viscera Seer, i find the sacrifice 2 creature + tapping too restrictive.

Do you often play Anointed Procession, Drivnod, Carnage Dominus, Mondrak, Glory Dominus ? I must admit i don't play them although I would like because they don't do anything when they arrive.