Most of the Modal Double-Faced cards are either creatures, Sorcery, or Instants
Despite all these virtues, there is a catch Deep Gnome Terramancers effect is ultimately contingent on what your opponents are doing
Lessons don't currently see a ton of play in other competitive formats, but there are a few popular Commanders for the archetype
If, for some reason, a Legendary creature is partnered up with a non-Legendary creature, only the Legendary can serve as your Commander
Oil counters are definitely around, especially in Blue-Red, but I dont feel super confident that your typical deck in the format will have enough of them to make this acceptable
Illustrated by Bradley Williams Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp