Gate

Gate is a nonbasic land type that was introduced in the Return to Ravnica block.

Description
Gates are common lands which enter the battlefield tapped. They can tap for one mana, typically from a selection of two colors. The subtype "Gate" means nothing on its own, but many cards from Ravnica sets have cards that care about the player controlling Gates. The subtype only appears on 11 cards.

The original ten Gates are the Guildgates, representing each of the Ravnican guilds. Each of the ten Guildgates can tap for one of the two colors associated with its respective guild. The 11th Gate is the Gateway Plaza, which represents the plaza connecting the Guildgates. Unlike the Guildgates, it is sacrificed unless its controller pays when it enters the battlefield, and taps for one mana of any color.

Role
According to Mark Rosewater the Gates weren't supposed to pull focus early, so there were just enough cards mentioning Gates to keep players from asking why the Gate subtype even existed. In the third set of the block their full potential was used.

List of Gate cards
The Gates of the five guilds featured in Return to Ravnica were first printed in that set. The Gates of the other five guilds were first printed in Gatecrash. All ten of which got a new artwork in Dragon's Maze.

Five of the original Gates were reprinted in Guilds of Ravnica, and the other five in Ravnica Allegiance. Each is featured in two common slots, each with different art, much like Wastes in Oath of the Gatewatch. Additionally, the Orzhov and Simic Guildgates were reprinted for the planeswalker decks in War of the Spark.

In addition to the reprinted Guildgates, Guilds of Ravnica introduced a new land with the Gate subtype; Gateway Plaza. It was reprinted in Ravnica Allegiance, featuring the same artwork, but different flavor text. It was printed again in War of the Spark, appearing for the third set in a row, this time with both new artwork and new flavor text.

Allied colored

 * Azorius Guildgate
 * Dimir Guildgate
 * Rakdos Guildgate
 * Gruul Guildgate
 * Selesnya Guildgate

Enemy colored

 * Orzhov Guildgate
 * Izzet Guildgate
 * Golgari Guildgate</c>
 * Boros Guildgate</c>
 * Simic Guildgate</c>

5 colored

 * Gateway Plaza</c>

Associated cards
The "Gate" subtype allow R&D to make these cards mechanically relevant. The following cards care about Gates:

Return to Ravnica

 * Armory Guard</c>
 * Gatecreeper Vine</c>
 * Ogre Jailbreaker</c>

Gatecrash

 * Crackling Perimeter</c>
 * Gateway Shade</c>
 * Greenside Watcher</c>
 * Hold the Gates</c>
 * Way of the Thief</c>

Dragon's Maze

 * Maze's End</c>
 * Opal Lake Gatekeepers</c>
 * Saruli Gatekeepers</c>
 * Smelt-Ward Gatekeepers</c>
 * <c>Sunspire Gatekeepers</c>
 * <c>Ubul Sar Gatekeepers</c>

Guilds of Ravnica

 * <c>Circuitous Route</c>
 * <c>District Guide</c>
 * <c>Gatekeeper Gargoyle</c>
 * <c>Garrison Sergeant</c>
 * <c>Glaive of the Guildpact</c>
 * <c>Guild Summit</c> (designed as a Gate build-around card for Draft. )

Ravnica Allegiance

 * <c>Archway Angel</c>
 * <c>Gate Colossus</c>
 * <c>Gatebreaker Ram</c>
 * <c>Gates Ablaze</c>
 * <c>Gateway Sneak</c>
 * <c>Open the Gates</c>
 * <c>Plaza of Harmony</c>

Gate message
Each gate of the Return to Ravnica block has several letters in the flavor text that are slightly elevated higher than the rest.

Return to Ravnica
"The guilds of Ravnica"

Gatecrash
"Will destroy each other"

Dragon's Maze
Order of the Guilds as depicted in <c>Tablet of the Guilds</c>

"Unless the maze is solved and the guildpact reborn"