Automatic Deck: The Swarm!

This "Automatic Deck" is like the challenges in born of the gods (Battle the Horde, Face the Hydra, and more.

All cards in The Swarm are colorless.

At the beginning of The Swarm's precombat main phase, it reveals the top two cards of it's library, then casts them. This ability enters the stack before any other abilities can.

The Swarm skips the upkeep and draw phases.

The Swarm may not have any cards in it's hand. If it would draw a card, it discards that card.

Whenever The Swarm would take combat damage, prevent that damage. It sacrifices that many permanents until it has none. When it has none, put that may cards from the top of it's library into it's graveyard. (Any effects that say "When this creature deals combat damage" do trigger.)
e.g. The Swarm has 3 creatures on the battlefield, all tapped. The player then attacks with a creature with 5 power, and would deal combat damage to The Swarm. Instead of taking that damage, The Swarm would sacrifice all three of it's creatures, then put the top two cards of it's library into it's graveyard.

The Swarm may not lose life. If a spell or ability would make it lose life, that spell or ability is countered instead.

The Swarm is defeated when it has no cards left in it's library and on it's battlefield.

Decklist:
Creatures:

15 Eldrazi Slicer: http://mtgcardsmith.com/view/eldrazi-slicer?list=set&set=6881
10 Eldrazi Protector: http://mtgcardsmith.com/view/eldrazi-protector?list=set&set=6881
10 Eldrazi Bloodcraver: http://mtgcardsmith.com/view/eldrazi-bloodcraver?list=set&set=6881
4 Eldrazi Fastrunner: http://mtgcardsmith.com/view/eldrazi-fastrunner?list=set&set=6881
4 Ulamog's Chosen: http://mtgcardsmith.com/view/ulamogs-chosen?list=set&set=6881

Sorceries:
2 Interference of Gideon: http://mtgcardsmith.com/view/interference-of-gideon?list=set&set=6881
2 Eldrazi Catalyst: http://mtgcardsmith.com/view/eldrazi-catalyst?list=set&set=6881
2 Kozilek's Aid: http://mtgcardsmith.com/view/kozileks-aid?list=set&set=6881
2 Sneaky Disaster: http://mtgcardsmith.com/view/sneaky-disaster?list=set&set=6881
2 Shake the Earth: http://mtgcardsmith.com/view/shake-the-earth-1?list=set&set=6881

Artifacts:
2 Emrakul's Hedron: http://mtgcardsmith.com/view/emrakuls-hedron?list=set&set=6881
2 Eldrazi Scion: http://mtgcardsmith.com/view/eldrazi-scion-3?list=set&set=6881
1 Eldrazi Mind: http://mtgcardsmith.com/view/eldrazi-mind?list=set&set=6881
1 Crumbling Hedron: http://mtgcardsmith.com/view/crumbling-hedron-1?list=set&set=6881
1 Hedron Row: http://mtgcardsmith.com/view/hedron-row?list=set&set=6881
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