These dont show up that often since most commons from new sets arent likely to make an impact and even if they do, they arent likely to be expensive
There are a lot of cards that already support this theme, and players love 4-color commanders because theyre rare
Glider Staff I know there's lots of equipment that cost 1, 2, or 3 to cast or equip to give a creature flying, but rarely are they tied to an ability as versatile as airbending
Exdeath, Void Warlock transforms into the more powerful Neo Exdeath, Dimension's End which has power equal to the number of permanents in your graveyard
All of these actions triggering without requiring combat is extremely effective, and when paired with other ways to boost the power and toughness of creatures, all while backup Commander Director Nick Fury is reducing the cost of Heroes by 1C, you can see why this deck is being hyped up as powerful right out of the box