gistfile1.txt

UB Midrange: 
You want to get to 5 mana asap so that you can start casting your 3 mana bangers through counter magic.
If you achieve this you win the game basically every time. Thran spider is the goat. 
We bring out our 5 mana spells as they get countered. Net comes out because often if net matters it will be tidebindered.
If you attempt to draw cards off the net you where probably gonna win that game anyway.
In:
  1 Elspeth's Smite
  3 Negate 
  2 Split Up
Out:
  2 Unstable Glyphybridge
  3 Mightstone and Weakstone
  1 Braided Net
Red Variants:
You goal is to stablize by making a wall of 10/10s then playing a crystal barricade. Alterantively you can gain 10 life
from a construct. Strangely this is the most important matchup for fomori vault. You really need to dig for crystal barricade or serrif.
We take out all the expensive cards we wont be able to cast and a land as our curve has reduced. Get lost is terrible into red 
but we can't cut all of them or we die to rage. Thran spider is just the only cut left to get to 9 and its not the best blocker aganist a rage.
In: 
  3 authority
  3 crystal barricade
  1 elspeths smite
  2 spilt up
Out:
  2 Unstable Glyphybridge
  3 Mightstone and Weakstone
  1 Get Lost
  1 Meticulous Archive
  1 Fabrication Foundary
  1 Thran Spider