Les vingt cartes Azorius Herald, Court Hussar, Induce Paranoia, Ribbons of Night, Crypt Champion, Squealing Devil, Tin Street Hooligan, Gruul Scrapper, Dryad's Caress, Seed Spark, Shrieking Grotesque, Revenant Patriarch, Steamcore Weird, Ogre Savant, Vigor Mortis, Rolling Spoil, Flash Conscription, Boros Fury-Shield, Patagia Viper et Plaxmanta forment un cycle du bloc des éditions Ravnica: City of Guilds, Guildpact et Dissension, ayant en commun le fait d'offrir un bonus lorsque leur coût de lancement est payé également avec la seconde couleur de la paire de couleurs correspondant à leur guilde.

Source (The Incarnations - "[...] Are there ways to make cards that are playable in one color but better if you have a second color? [...] Instead of requiring mana of a certain color as an additional cost, we could just give you a bonus for using the secondary color when casting the spell. We ended up making a 20-card cycle with this ability in the original Ravnica: City of Guilds block. We made 20 because each guild had a spell going in each direction.")