Buster Sword Despite undoubtedly being iconic, Buster Sword is a bit weak, all things considered
FIRST POKEMON SETS EVER
Part of what contributes to Emrakuls high value is that it is one of the few ways to control your opponents turns in Magic, and the only creature to do so too
Geosurge is still good enough to drop a big finisher (Inferno Titan, Wurmcoil Engine, maybe Balefire Dragon if you want to get cute) on turn 4, but that requires having both the enabler and the big creature in your starting 10 -- and remember that contemporary mono-red doesn't really have filtering or card draw
We also shouldnt overlook classic colorless support cards like Strionic Resonator, Conjurer's Closet, and Panharmonicon to stretch your enters abilities even further
The important thing for landfall commanders is an ability that either benefits you from making land drops or helps existing landfall cards function better