I am a big fan of the Ravnica/Guildpact/Dissension expansion block. I am a greybeard collector, who starting opening packs during Revised and The Dark, but needed to stop a few years later, due to work and family constraints. After a 10-year hiatus, I started back up again with a booster box each of Coldsnap and Dissension. Outside of the shocklands, nothing represents the Ravnica block more than the Hildebrandt signets. By returning to the Ravnica plane twice (Return to Ravnica and Guilds of Ravnica) and with the surging popularity of the Commander format, Wizards of the Coast has pretty much cemented the guild names as synonyms for two-color mana combinations, reprinting the signet cycle no less than 10 times. I do collect all signets, but I decided to break up the series into manageable parts and the change in artwork seemed like a good place as any to delineate each group.