Quote Originally Posted by Clark Kant View Post
Doorkeeper Thrull is way better than Torpor Orb. Being able to flash it in response to your opponents play is what makes it so amazing. Flash is why Dress Down is such a potent card and regularly ends up as a 2 of in controllish decks that dont play Dreadnought
Doorkeeper Thrull's also way better than Squire. But Dreadnought already wasn't playing either Torpor Orb or Squire (or Hushbringer). Blue's enablers are better. 4x Stifle 4x Dress Down already counter enemy ETB triggered abilities and pitch to Force.

Reasons to consider Doorkeeper might be if you go UW and want more copies of Dress Down but less copies of Stifle, e.g.:
-More hate for enemy creatures
-Ambush small attackers like Bowmasters
-Midrange deck without Wasteland/Daze/Stifle mana denial plan
-Avoid 2-for-1s with Stifle+Dreadnought
-White count for Solitude

White is a good color to be in because of the premium removal, planeswalkers, and board reset. You lack a secondary threat (probably can't afford to splash UUGG Uro) but could play a more controlling game with Dreadnought finisher and Scroll of Fate.