MTG Salvation

Lifebane Zombie: The MVP of the night, Lifebane Zombie proved extraordinarily powerful with Whip Of Erebos. Even though he doesn't exile creatures against a lot of decks, he still lets me see the opponent's hand and plan around it, and the 3 intimidate damage hits reliably, and, with Whip, heals me very reliably.

Desecration Demon I run enough kill spells to make sure this guy can reliably swing every turn, and it really, really hurts. Even if they kill him once, bringing him back, with haste, with Whip is very, very nasty, and absolutely game-changing.

Gray Merchant Of Asphodel With Lifebane Zombie and Desecration Demon and Underworld Connections main-board, this guy swings the board hugely when he drops. It was not uncommon for me to drain 6, and I even had a game where he drained for 10, and I could easily sac and bring him back out the next turn for another huge impact. Definitely one of my favorite cards in the deck.

Erebos, God Of The Dead Turning this guy into a creature was never a problem, and he goes very well with Devour Flesh, and Whip ensures I can afford to draw cards for days.

Abhorrent Overlord: The big finisher, Overlord coming out with 6 harpies really seals the deal for the opponent. I won every game he resolved the next turn, either through damage or my opponent simply conceding. The body is fantastic, and bringing out an army of evading attackers is also great. And when I can drain off every one of them, it only gets better.

Young Pyromancer I've found him incredibly useful. Not only do his tokens stall aggro decks and non-trampling fatties, he synergies exceptionally well with Purphoros, God Of The Forge. Very strong in multiple, and a good late draw even in the mid or late game. Automatic 4-of.
Guttersnipe The primary win condition of the deck, which runs 24 instants and sorceries. I win most of my games through guttersnipe damage, and with Izzet Charm and Steam Augury for digging it is pretty easy to get him out in multiples, which only accelerates the inevitable. I can see three working fine, but I really like the chance of multiples of him out simultaneously, and he's therefore an automatic 4-of for me.
Spellheart ChimeraAn alternative win condition. My graveyard is always full of instants and sorceries, so he can come out as quite the beater. Trample and flying make him great. I only run two, because he is strongest in the mid and late game, and he doesn't necessarily look good in my opening hand. Steam Augury and Izzet Charm both work well with him - even if they end up putting instants // sorceries in my graveyard to get him, it only helps him get larger.
Purphoros, God Of The Forge This guy is just so good. I cast an instant and get a token from Young Pyromancer? Take two. I top deck my spell heart chimera? Comes out with a Shock attached. His damage adds up very quickly, and the pump ability is a great mana sink for my elementals and chimeras.
Omenspeaker In the board for the aggro matchup, when guttersnipe and Purphoros damage are less important and burn spells are crucial, Omenspeaker helps me dig for the right cards and blocks everything from Cackler to Ash Zealot.
Izzet Staticaster Flashing in a 3-toughness blocker against aggro is useful. Also useful is the ability to unexpectedly Gut Shot a whole wave of elemental tokens, or wipe out their fire drinker satyrs. It can even help stack damage through burn onto higher toughness creatures.
Stormbreath Dragon If my guttersnipes and pyromancers aren't sticking, its nice to have a strong creature to push through some extra damage. Plus, against Sphinx's Revelation-running control, that monstrous damage can really help negate some of their life gain.

Izzet Charm: This card is like a swiss army knife. I can burn down a creature early game, counter a kill spell targeting one of my 'snipes if they're tapped out, and loot for two to dig for answers. This spell does work.
Lightning Strike: Functionally a Searing Spear, this spell is crucial to the deck. Hitting either the opponent or a creature for 3 is so much better in practice than it looks on paper.
Magma Jet: Not as high-damage as Lightning Strike, Magma Jet has the advantage of scrying to help prevent dead draws and look for answers.
Mizzium Mortars: Though it usually works as a high-costed Flame Slash on things like Lox Smiter, Mortars has important versatility, and clearing a wave of creatures is a pretty powerful effect, and one I'm always glad to have.
Turn // Burn: This is a powerful card. Five mana to kill a desecration demon, or a god, or, well, anything, is very critical in getting rid of things that are problematic for this deck. It's not uncommon for either of its halves to be useful on their own, either, though I always feel bad when I just cast Burn for the Shock damage.
Steam Augury: This card is pretty skill-intensive, but being able to dig for answers is good, and giving your opponent choices is good. More choices leaves them more room to make mistakes.
Swan Song: Pretty good for countering gods, or a removal that would kill one of my win conditions, I like to play Guttersnipes as a 4-drop. Spellheart Chimera eats the tokens it produces for lunch, and you can always just burn it if its threatening you.
Essence Scatter: Countering a creature that I wouldn't be able to burn easily is essential.
Anger Of The Gods: Now, this spell kills your creatures too. But I rarely play a guttersnipe or something before turn 4 anyways, and if I don't have a Pyromancer out, killing a wave of creatures is very, very important. This helps stall out very fast aggro decks.
Cyclonic Rift Very good for removing Planeswalkers, or clearing the board late-game for a big swing with elementals and such. It can also help by removing a creature you can't burn and giving you the opportunity to counter it.
Dissolve A Cancel that lets you scry away dead draws. Very, very powerful, and very, very good. A must-sideboard against control decks.
Counterflux: Situationally useful, it can help ensure the cancel goes through, if nothing else. Generally useful against Azorius control.