La carte Fervor est une référence à Concordant Crossroads de par son effet, à la nuance qu'elle limite le bonus qu'elle offre aux créatures de son contrôleur.

Source (Fervor - "[...] it would be great to bring that feel over to the color that was supposed to give all your guys haste—red. The one change I made was to make it only affect your guys, because otherwise the card was usually only good in a deck where you were trying to be faster than your opponent.")