Obzedat, Ghost Council – Gatecrash mythic rare. From the Gatecrash FAQ:

When Obzedat is returned to the battlefield by its last ability, it gains haste indefinitely. This may be relevant if a player gains control of it later using a spell or ability that doesn't give it haste.

High Priest of Penance – Gatecrash rare. From the Gatecrash FAQ:

High Priest of Penance's ability triggers once for each instance of damage dealt to it, not once for each 1 damage. The ability will trigger even if High Priest of Penance is dealt lethal damage.

Enter the Infinite – Gatecrash mythic rare. From the Gatecrash FAQ:

If you are playing with the top card of your library revealed (due to Garruk's Horde, for example), you'll reveal each card before you draw it.

Call of the Nightwing – Gatecrash uncommon. From the Gatecrash FAQ:

You can exile Call of the Nightwing encoded on the Horror creature token it just created.

Experiment One – Gatecrash uncommon. Frankly, Experiment One seems pretty successful. It's not every group of biomancers that could get it right the first time. Good job, Simic!

All of Gatecrash is now in Gatherer! Be prepared for the Prerelease on January 26-27!

Wojek Halberdiers – Gatecrash common. The Wojek, a special division of the Boros, were in the names of four cards in Ravnica: City of Guilds.

All of Gatecrash is now in Gatherer! Be prepared for the Prerelease on January 26-27!

Murder Investigation – Gatecrash uncommon. According to Murder Investigation, the more powerful a creature is, the more its murder gets investigated.

All of Gatecrash is now in Gatherer! Be prepared for the Prerelease on January 26-27!

Realmwright – Gatecrash rare. The Gatecrash Card Image Gallery is complete! Every card in Gatecrash is in there! Be prepared for the Prerelease on January 26-27!

Immortal Servitude – Gatecrash rare. The Gatecrash Card Image Gallery is complete! Every card in Gatecrash is in there! Be prepared for the Prerelease on January 26-27!

Ætherize – Gatecrash uncommon. The "Æ" ligature at the beginning of Ætherize isn't normally a letter in English, although it used to appear in words like "encyclopædia."

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Glaring Spotlight – Gatecrash rare. When Aaron Forsythe previewed Glaring Spotlight on Twitter, he explained, "Note that you can also turn the Glaring Spotlight off and get busy in the darkness."

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Undercity Informer – Gatecrash uncommon. Undercity Informer isn't officially associated with a guild, even though it's clearly Dimir.

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Five-Alarm Fire – Gatecrash rare. The goblins in the art of Five-Alarm Fire don't look particularly worried about the fire right behind them. Those guys are bad news!

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Simic Keyrune – Gatecrash uncommon. Four of the Gatecrash keyrunes are now viewable in the Gatecrash Card Image Gallery! It's updated every day with the latest card previews, including cards previewed on DailyMTG and elsewhere. Be prepared for the Prerelease on January 26-27!

Thrull Parasite – Gatecrash uncommon. Thrull Parasite appears to eat counters. Luckily for it, there are a lot of counters to choose from!

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Rubblebelt Raiders – Gatecrash rare. It's fun to imagine Rubblebelt Raiders yelling at your other creatures, encouraging them to join in the attack.

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Dimir Charm – Gatecrash uncommon. Dimir Charm combines countermagic, creature destruction, and the manipulation of your opponents' draws. It's everything a Dimir mage could want!

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Rapid Hybridization – Gatecrash uncommon. The Simic will take their test subjects where they can find them.

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

High Priest of Penance – Gatecrash rare. If someone kills your high priest, they'll definitely undergo some penance.

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Biovisionary – Gatecrash rare. It's not mentioned on the card, but you get extra style points if at least one of the Biovisionary cards you win with is actually The Card With No Name.

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Lazav, Dimir Mastermind – Gatecrash mythic rare. The leader of the most elusive guild is, of course, extremely elusive himself. He could be anyone!

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Murder Investigation – Gatecrash uncommon. As the police force of Ravnica, the Boros are the ones most likely to be investigating murders on the street.

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Rubblehulk – Gatecrash rare. Once Rubblehulk is on the battlefield, its controller will never be sad about drawing an extra land.

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!

Whispering Madness – Gatecrash rare. In the art for Whispering Madness, a Dimir mage appears to be getting advice from tiny skeleton. That's probably safe, right?

The Gatecrash Card Image Gallery is updated every day with the latest card previews. Be prepared for the Prerelease on January 26-27!