Emblem of the Warmind is the most mana efficient way to let you go off the turn you play kotr -- that I've found. Alternatively, if you can find a way to cheat in Hellraiser Goblin.
This deck can't really play the "Twin approach" to modern since you're not flashing in any of your enchantments or kotr. They can basically tapout when they want, how they want. Alchemist's Refuge is probably not able to make the cut but it does give you an option of eot casting a kotr, untapping and casting Retreat.
Emblem of the Warmind is the most mana efficient way to let you go off the turn you play kotr -- that I've found. Alternatively, if you can find a way to cheat in Hellraiser Goblin.
Our list has Apostle's Blessing in it over Dispel, since it gets around the Abrupt Decay stuff.
Also, Dryad Arbor is both in and out. Really, it just depends on BGx.
Deck is super dead to maindeck Relic of Progenitus.
This deck can't really play the "Twin approach" to modern since you're not flashing in any of your enchantments or kotr. They can basically tapout when they want, how they want. Alchemist's Refuge is probably not able to make the cut but it does give you an option of eot casting a kotr, untapping and casting Retreat.