Hedron Crab is just an efficient mill engine because we can just play a land to mill ourselves for 3 cards, so just one of these triggers is enough to pay Araumi's up front exiling cost. This is also the reason we're running extra fetch lands Prismatic Vista and Fabled Passage.
Stitcher's Supplier allows us to mill cards whenever it enters the battlefield or dies. If we Encore this creature while we have 3 opponents, we'll mill 9 cards upon field entry and another 9 when they all die or get sacrificed. That's 18 more cards for Araumi to play with and plenty of options for us to Encore later on.
Gnawing Vermin is a fantastic card to Encore in this deck because it cost just to do so. When we do, we can mill 6 cards which is exactly what we want and when each of these token copies die, they can give a creature -1/-1. So we can kill up to three weak creatures (for example Elvish Mystic) or we can kill a 2-toughness and a 1-toughness creature or just point it all at a 3-toughness creature and get rid of that. Gnawing Vermin does a lot in this deck for being a little 1-mana creature.
Teardrop Kami is a great combo extender because it can untap Araumi of the Dead Tide, allowing it to give Encore to more than one creature in our graveyard every turn. We can combine this with mana-generating creatures to make huge plays in a single turn.
Floating-Dream Zubera draws us a card for each other Zubera that died in that turn. In a singleton format, this usually isn't great, but with Araumi's effect, we can get 3 copies of this into play which will (no matter what) all die during that same turn. When the first one dies, we draw 1 card. When the second dies, it draws us 2 (because it sees itself and the one before it). When the third dies, that's 3 cards for a grand total of 6. Not bad value for a 2-mana Encore cost.
Selhoff Entomber is sort of like a looter, except it requires us to discard a creature first before we get to draw a card. But that shouldn't be an issue, considering we're playing 39 of them in the main deck.
Merfolk Looter is an efficient looting engine, allowing us to dump cards we don't want and draw through our deck looking for combo pieces and counter spells.
Thought Courier does exactly the same thing as Merfolk Looter, it's in here just as a second functional copy.
Vohar, Vodalian Desecrator is yet another efficent 2-mana looter except this one has the added optional effect of being able to "flashback" an instant or sorcery in our graveyard, useful for when we've milled something important and need to be able to cast it.
Thassa's Oracle is literally only in here for the infinite mill combo which is explained in the Combos section of this Primer.
Halimar Excavator doesn't look like a very impactful mill engine on the surface but it's mainly in here for a powerful combo with Araumi of the Dead Tide, Teardrop Kami and Glasspool Mimic
. See the Combos section of this Primer for details.
Deranged Assistant is a unique mana dork because it requires us to mill a card in exchange for . Great for our purposes then, mill and ramp all in one.
Cloud of Faeries can be encored to untap lands six times when the copies ETB. Even if we don't have six lands, we can just untap and tap the same two lands for mana in between triggers so we'll be getting access to six mana regardless. This is a great card to generate mana with Araumi to make more plays. We also have the option to cycle it to draw a new card, and this is perfect because it wants to be in the graveyard anyway.
Undead Butler mills three cards upon ETB which on its own is solid in an Araumi deck but it gives us the option to retrieve a creature card when it dies, something we may not need very often but the option is nice to have.
Fallaji Archaeologist is just a reliable mill effect upon ETB, just like Stitcher's Supplier. However, we also have the option of keeping a non-creature, non-land card from among the three cards it mills. This deck is all about Encoring creatures, and we have several ways of retrieving artifacts, but unfortunately we can't do much with Instants, Sorceries and Enchantments that are milled so Fallaji Archaeologist giving us the option to keep one of them is actually very nice. Furthermore, because the ability is optional, we can just choose to dump all the cards if we need fuel to pay for Araumi's ability.
Archaeomender is really only in here in case we mill our Mesmeric Orb and need to get it back. We can't exactly reanimate Artifacts but we can Encore Archaeomender with Araumi's effect and use the ETB effect to get Mesmeric Orb (and two other artifacts) from our graveyard back into our hand.
Emry, Lurker of the Loch is in here for the same reason, just in case we need to get Mesmeric Orb out of the graveyard. However Emry also has a self-mill ability when she hits the battlefield so she works well in this deck. Keep in mind that she is Legendary so if we make three copies of her, we'll have to give two of them up immediately but they will at least trigger their mill effects when they ETB so it's not a total loss.
Jace's Archivist is essentially a repeatable Windfall. Just a good way to cycle through our deck, dumping resources for Araumi into our graveyard while keeping our hand topped off.
Zellix, Sanity Flayer has an activated ability we can use to mill ourselves to keep the fuel burning for the Araumi fire, but it also generates tokens we can use to attack or block each time one of our creature cards is milled.
Tribute Mage is one of the best cards in this deck because not only do we have several important 2 CMC artifacts it can fetch, but with Araumi's effect, we can Encore this thing for 3 copies and fetch 3 of those important artifacts - namely Mesmeric Orb, Altar of Dementia and Lightning Greaves.
Illuminor Szeras works well in this deck because it can sac a creature who has served its purpose (for example an ETB effect such as Tribute Mage). We then get mana in exchange, which we can then spend to cast other spells or just encore whatever we sac'd for repeated ETB value (or encore whatever else we want).
Fleshbag Marauder, Merciless Executioner, Demon's Disciple and Plaguecrafter are all in here for essentially the same reason. They require all players to sacrifice a creature whenever they enter the battlefield. If we Encore any of these with Araumi, we'll be wiping 3 creatures off of each of our opponents' boards. If we do this while we have a Grave Pact in play, that's 6 creatures off of each opponent's board. These gang of misfits in this deck disallow anyone from maintaining any sort of board presence.
Glasspool Mimic
is mainly in here as one of our combo pieces but we can always play it and copy one of our existing ETB effects on the field for extra value. It combos with Halimar Excavator and Cavalier of Night, both of which are explained in the combos section. At its absolute worst, we can just play it as Glasspool Shore
if we need a land drop desperately.
Vizier of Tumbling Sands is mainly in here as a combo piece, but we can always Cycle it away for a new card and use that ability to untap Araumi of the Dead Tide so she can use her Encore effect again.
Kelpie Guide is effectively a second copy of Vizier of Tumbling Sands for combo purposes.
Fatestitcher is basically a third copy of Vizier of Tumbling Sands but also has the ability to Unearth itself for 1 mana, allowing us to quickly untap something like Araumi if we need to in a pinch.
Solemn Simulacrum ramps us by 1 basic land when it enters the battlefield and draws us a card when it dies. If we Encore this with Araumi, we're getting 3 basic lands and drawing 3 cards when the token copies die.
Ravenous Chupacabra is just in here for targeted ETB removal. We use this to get rid of a specific creature that our opponents have been saving from our Plaguecrafter effects. Encoring this means getting rid of any 3 creatures we want.
Impaler Shrike, when Encored, allows us to draw 3 cards each whenever we sac them after dealing combat damage. That's 9 cards total for just 4 mana.
Reef Worm is just disgusting amounts of value in this deck. If we Encore this, it's guaranteed to die, meaning we get 3 fish tokens. When those die, we get 3 Whale tokens. When those somehow die, we get 3 Krakens that are 9/9 each.
Vile Entomber basically Entombs a creature when it enters the battlefield, helping us set up plays for later by dumping cards we'd like to Encore with Araumi's ability.
Corpse Connoisseur is another copy of Vile Entomber except this one can Unearth itself in case we need it but don't want to Encore it.
Peregrine Drake untaps 5 lands when it enters the battlefield. If we Encore this card, we get 3 copies, whose triggers we can stack appropriately to essentially generate 15 mana. This interaction is explained in detail in the Combos section of this Primer.
Gray Merchant of Asphodel can potentially end games when Encored by Araumi. If we Encore Gary with 3 opponents, they will all enter and trigger their drain ability for a minimum of 7 EACH ( devotion from each Gary and from Araumi). So if we have 3 opponents, we're draining them for 21 life EACH and gaining 63. And remember, that's the BARE MINIMUM. If we have any other black mana symbols on permanents we control, we'll be draining them for even more. Insane value.
Cavalier of Night is an amazing creature to encore because when the three token copies enter, they can all sac each other to their effects, which lets us kill three enemy creatures and then reanimate three of our own (yes, I've checked the ruling on this and it does work; you can sacrifice the first token copy to the second one's ETB effect, the second one gets sac'd to the third and the third to the first and they all trigger simultaneously). It also lets us mill opponents out with Altar of Dementia and Glasspool Mimic
which is explained in detail in the Combos section.
Necron Deathmark is insanely good in this deck because even if we just cast it as a normal creature, it lets us destroy another creature and then mill a player. In most cases we'll be milling ourselves but in niche scenarios we can mill another player if they've scryed or tutored for a card on top of their deck. Of course, if we encore it we can destroy 3 creatures and mill ourselves for 9 cards. This card is a Ravenous Chupacabra and Undead Butler rolled into one.