Astor, Bearer Of Blades is a low casting cost on its own, making it so you can start taking advantage of its ability early on in the game and start swinging your Vehicles in your damage as soon as possible
two that stand out are redirecting a Bojuka Bog when I had a handful of recursion, and most recently, when my good friend Marcus directed Sorin Markovs downtick at me to set my life at 10
The best spirit commanders are multicolored, which makes sense for Commander, but there are also some interesting mono-color builds
If you are going in this direction, the 1-cost Robin Hood should also be consider to widen your strategy
If you were already planning to pick up a box, or split one with friends, this is the sort of price cut that actually starts to feel worthwhile
Cycling commanders like Gavi, Nest Warden and Ravos, Soultender use it, as does a different mode of deck churn for Demonlord Belzenlok decks