This deck is 100% guaranteed to finish the game on the first turn. Allowing for the occasional mulligan, this deck has never failed to end the game on the first turn. Chances are, the game is over before your opponent even has a chance to play anything.
To be honest though, the idea for this deck is to kill yourself by turn 1 every game. The idea isn't my own, but made their goal a turn 3 finish (loss). I have improved the deck and the strategy is explained below.
The Biggest Losers
Immolating Souleater - Half of the mana base for this deck is because of this card. As long as you make sure that your life total is even and you have 2 mana, just activate as many times as you need.
Hex Parasite - This card + any land = instant lose con. There is nothing in the rules about making x = 0, so another way phyrexian mana has helped us finish games quick.
Plunge into Darkness - This card was a last entry because it is a bit harder to cast, but worth it. As an added bonus, once you've spent all of your life, you get to draw one of the top x cards :D
Pact of the Titan - This card seems a bit strange considering the goal is a turn 1 loss, and this would seem to be an issue turn 2. However, the reason this is the only pact I'm running is because it doesn't require any targets and if your opponent goes first, the game is over before you even see your own main phase. I would probaly sideboard some extra pacts considering it'll be your choice to draw or play game 2.
Spoils of the Vault Name Black Lotus, see what happens. Instant speed, so this is the only turn 0 kill if you're on the draw.
Win (lose) conditions
This is a list of all of the potential combos to look out for. See one of these big combos and the game won't be taking up much more of your time.
They Go First + Pact of the Titan
Any of the 40ish free mana producing cards + Hex Parasite
Any manner of acquiring 2 mana + Immolating Souleater
Just about any two mana producers + Plunge into Darkness
1 mana + Spoils of the Vault
And there you have it. The only deck that will finish a game on turn one every game you play. This deck is legacy legal.
