The end of the Battle for Zendikar World Building panel had a surprise for viewers. Today the second set in Battle for Zendikar Block was officially revealed to be Oath of the Gatewatch.

Set Name: Oath of the Gatewatch

Block: Set 2 of 2 in the Battle for Zendikar block

Number of Cards: 184

Prerelease Events: January 16–17, 2016

Prerelease Format: Sealed (4 Oath of the Gatewatch/2 Battle for Zendikar)

Release Date: January 22, 2016

Launch Weekend: January 22–24, 2016

Game Day: February 13–14, 2016

Magic Online Prerelease: Events January 29–February 1, 2016

Magic Online Release Date: February 8, 2016

Magic Online Release Events: February 8–24, 2016

Pro Tour Oath of the Gatewatch: February 5–7, 2016

Pro Tour Oath of the Gatewatch: Location Atlanta, GA

Pro Tour Oath of the Gatewatch Formats:

Official Three–Letter Code: OGW

Twitter Hashtag: #MTGOGW

Initial Concept and Game Design: Ethan Fleischer (lead), Graeme Hopkins, Ari Levitch, Ken Nagle, Adam Prosak, Mark Rosewater

Final Game Design and Development: Ian Duke (lead), Dave Humpherys, Jackie Lee, Adam Prosak, Gavin Verhey

Languages: English, Chinese Simplified, Chinese Traditional, French, German, Italian, Japanese, Korean, Portuguese, Russian, Spanish

Available in: Booster Packs, Intro Packs*, Fat Pack*, Clash Pack*

(*-Not available in all languages.)

Previously known as "Sweat" this set seems to have four of the Origins five team up to save Zendikar.

Also announced today was the Prerelease structure for Oath of the Gatewatch. Players will receive to boosters listed above as well as a random promo rare that can be used in their deck. Participants will also get a deckbox that can store a twenty sided die - included in the box!