Ten gates were released with that Magic set, one for each of the 10 Ravnican guilds (Izzet Guildgate, Orzhov Guildgate, and Simic Guildgate, and so on for each color pair), each of which enters the battlefield tapped and taps for 1 mana of either of the guild's colors
However, Wizards has ruled that choosing to not end the turn doesn't constitute an "independent action"
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Blade of Selves (Reprint) Another I kind of want this card but not for 30 dollars reprint, just like Kindred Discovery
Game variety remains a major draw, but structure matters just as much as size
Rootwire Amalgam can also make a big token