Frontier decks

What is the Frontier format in Magic?

Frontier is an unofficial, nonrotating Constructed format originally created around cards printed in Standard-legal core and expansion sets beginning with Magic 2015. This cutoff corresponds with the new modern card frame introduced with that set.

Frontier emerged as a middle ground between Standard and Modern before Wizards introduced the Pioneer format. It remains a recognizable community format, although Pioneer has largely occupied the gameplay niche that Frontier was originally designed to fill.