Mephistopheles is my favorite card, and Air is my favorite element, so this deck was created because of my desire to make a Mono-Air deck that uses Mephistopheles effectively.
With that said, let me go over the list!
Version One of this deck was initially designed this deck without an Avatar in mind. I planned to use whichever Avatar fit the deck best, and was going to use a generically good one like Sorcerer or Savior if none came to mind. But fortunately one did.
Necromancer ended up being the perfect fit for this deck. His ability to generate 1/1 Skeletons is great for smoothing out our curve. It's a bonus that the tokens are Undead/Evil, since the deck has many payoffs for both taglines.
1x Eclipse- Serves as an anthem for most of our minions AND acts as a Summoning Sphere.
2x Sphere of Animosity- Shuts down healing entirely for the Avatar inside. Also great for shutting down Avatars like Realm Eaterand Battlemage.
1x The Black Plague- This is good removal & area denial. Synergizes well with Necromancer, since we can send tokens in to die for the cause to keep the plague going if need be.
1x Amethyst Core - I just think it's neat. And we have a lot of top end, which this helps get out.
2x Mix Aer - I like this a lot. It can be really nice to open with this since it gives us the mana to do something like a turn 2 Daperyll Vampire.
2x Torshammar Trinket - A repeatable method of buffing our goobers is nice. It's doubly nice in a Necromancer deck, since we pop out Skeletons like a pez dispenser.
1x Pnakotic Manuscript - Repeatable card draw that is super cheap. We make a lot of expendable bodies for this.
2x Toolbox - Just an amazing staple. Lets us grab a variety of answers from the Collection.
1x Char Omphalos - Fantastic card advantage engine.
1x Dank Omphalos - Fantastic card advantage engine.
4x Pith Imp - Low-cost Evil disruption. Can ruin an opponent's entire game if it hits something juicy.
2x Earl of the Ivory Towers - Solid low-cost Spellcaster who happens to be Evil.
3x Gibbous Nightgaunts - A 3 Power Demon with Airborne and Voidwalk is just a nice statblock for this list.
1x Jack the Ripper - Extremely good removal.
4x Screamer - Really useful ability. Good for aggro and defense.
2x Sturmgeist - Amazing. Able to deal tons of damage if left unanswered.
3x Stygian Archers - Amazing. Great Ranged minion with a strong ability.
1x Bane of Aventis - Fantastic answer to Ward.
1x Archangel Gabriel - Strong minion that replaces itself.
3x Daperyll Vampire - Staple. Able to heal you for tons, and is a great body.
2x Legion of Gall - Absolutely shreds your opponent's Collection.
2x Renatus Trueblood - Two extra copies of Daperyll Vampire is nice.
2x Grandmaster Wizard - Refills your hand. Never unhappy to see it.
1x Mephistopheles - I just think he's neat.
1x Nosferatu - Absolutely annoying for an opponent to permanently get rid of.
1x Draconian Bonekite - Massive Airborne goober. Ability is great for closing out games.
1x The Doom of Dilmun - This card is phenomenal. The fact we can get it out for free with Mephistopheles is nuts, but this card is fantastic even if we're hard-casting it. Near impossible for an opponent to remove.
1x Browse - This is just a staple in every mono-air deck. It's such a good way of finding whatever it is we need at any given time.
2x Blink - Solid movement card that replaces itself.
3x Desecrate - Letting something like your Daperyll Vampire or Legion of Gall get a second strike in can be game-winning. Also great for answering any super pesky sites.
3x Kiss of Death - Over half our goofballs can cast. We even make tokens that can cast this. And this happens to be fantastic removal.
1x Black Mass - Great way of refilling the hand.
2x Whirling Blades - This card is devastating. Functions like a one-sided board wipe a lot of the time.
1x Cloud City - Amazing ability.
1x Dark Tower - Temporary ramp is good.
1x Defiler Spire - Nice card to play when we're on the offensive since it can drain health fast.
4x Den of Evil - This is like 4 extra copies of the Towers in our deck.
3x Fields of Phyxis - This + Desecrate gives us plenty of ways of dealing with annoying sites. Also, being blunt, I got the Dust Promo for this and wanted to use it.
2x Forsaken Crypt - I like being able to generate a body without spending a card to do so. I only run 2 of these so that I can have more flexibility in the Collection.
1x Gothic Tower - Temporary ramp is good.
1x Lone Tower - Temporary ramp is good.
1x Merlin's Tower - Temporary super-ramp is great.
2x Observatory - Topdeck manipulation is good.
4x Open Mausoleum - Extra bodies without spending cards to make them is great. Playing this turn 2 is nice with Necromancer since we can turn 1 make a token into turn 2 two more tokens.
2x Sold-out Cemetery - We have a lot of Undead, as well as the ability to pump out Undead tokens. This is nice free-movement with them.
1x The Manor at Daperyll Hill - Very nice defensive card.
2x Watchtower - Completely shutting down Stealth is great.
2x Wizard's Den - I don't care about the downside. Card draw is card draw.
2x Wuthering Heights - Great card. Using this to move an enemy onto Bottomless Pit is hilarious.
3x Desecrated Ground - Needed for Desecrate.
1x Zap! - 3 mana to kill an Avatar on Death's Door is amazing.
1x Disenchant - 4 mana to blow up, ideally, 2+ things is amazing.
1x Tactical Move - The ability to reposition our entire board for 4 mana can come in handy in a pinch.
2x Ghoul - Needed for Forsaken Crypt.
1x Grapple Shot - Nice bit of positioning and removal when needed. Also just a great card.
1x Murder of Crows - Mass Ward removal or token removal is great.