Archangel Avacyn replaces the old Thundermaw Hellkites because she has Flash and is is more versatile, Unsubstantiate over Remand because of its ability to bounce opposing creatures or return friendly creatures to hand, and Basri as a source of pushing through extra damage.
I'm not running Spell Queller or Tef3ri because I have a flash based tempo build already.
Magic the Gathering, FNM is TM and copyright Wizards of the Coast, Inc, a subsidiary of Hasbro, Inc. All rights reserved. This site is unaffiliated. Articles and comments are user-submitted and do not represent official endorsements of this site.