Promos, Alternate Art, and More MTG sets these days always have alternate borders, borderless art, and alternate frames, alongside foil or special foil treatments
It generates sacrifice fodder, gives you a sacrifice outlet, and incidentally hates on your opponents' graveyards
Sidequest: Play Blitzball / World Champion, Celestial Weapon Sidequest: Play Blitzball sends you on a journey to hit your opponents with enough damage, offering a similar buff as cards like Battle-Rattle Shaman
Note that the Oracle text is significantly different now
They offer extra implied percentage if you happen to see a Chaplain
These are the ones that I think will have the most impact on Commander