Meh, I am not a huge fan of
Scroll Thief.
Sure it survives well enough with its 3 toughness, but it also gets favorably blocked by a lot of stuff in the format because of its 1 power.
The card doesn't have any evasion and only has 1 power, so it doesn't do a very good job of putting the opponent on a clock, especially when you consider it is a 3cmc creature.
Even when it does connect, the outcome isn't that great. Sure drawing a card is nice, but I personally don't believe using removal/bounce is worth it just to do 1 extra damage and draw you a card (the play gets better with MI or Bident on the table though).
The only place where I have had any success with them is in my U/W Enchantment deck, where it has stuff like
Nimbus Wings and
Ethereal Armor to help make sure it can make it through consistently and without having to put ourselves down cards to get it through (by using Bounce/Removal/whatever).
To be honest with you, I am not a big fan of
Chasm Skulker either, because of how potentially slow and vulnerable it is *shrug*
Also not really understanding the
Kraken Hatchling, sure it Evolves Raptor, can trigger MI, and works decently with Quickling, but it doesn't really do anything to actually help you beat down and close out games quickly.
This is how I would take things personally
Plenty of evasion creatures to beat face, with some lord effects to speed things up.
Warden of Evos Isle is decent evasive beater for the cost, and drops the cost of almost everything in the deck. Quicklings become
to cast, Nibilis, Warden, and Pestermite get dropped to
, Phantasmal Dragon gets dropped to
All of which help with the fact the deck only runs 22 lands.