In the lead-up to the Ravnica Allegiance Prerelease, Wedge made an exhaustive guide to every guild in the set to inform your decision on which guild to pick when you play in your own Prerelease event this weekend. Wedge covers not only what each guild's area of expertise is, but also how you should organize your cards, what you need to bring to the tournament, and which kinds of cards each guild should look to splash.
Azorius (White/Blue): The control guild!
Orzhov (White/Black): The grindy guild!
Gruul (Red/Green): The do-it-all guild!
Rakdos (Black/Red) The aggro guild!
Simic (Blue/Green): The ramp guild!