Along with Baroness and Swordsoul Blackout, it interferes with your opponent
For example, if Deadeye Navigator is soulbounded with Peregrine Drake then you can pay two mana to flicker the Drake and untap five lands
Most meta Field Spells aren't generic except for a small handful
Lets break down how this trick works, and why you wont get Pinkerton'd for it
FFC - Marvelous Edge 240 Barbaracle Ability: Stone Arms Once during your turn, you may attach 1 Fighting Energy from your hand to 1 of your Fighting type Pokmon
Its most popularly utilized as a background for Wyll, Blade of Frontiers for an Izzet commander color identity, but other non-background commanders like The Pride of Hull Clade and Obeka, Splitter of Seconds can benefit from it, too