The commanders themselves don't have to be the creature type they're supporting, but I prefer that they are
The hybrid uncommons communicate some of the differences at play: Fireborn Knight rewards power-pumping, Elite Headhunter plays more of a sacrifice-attrition strategy (which ostensibly is WBs shtick), and Resolute Rider is a potent, hard-to-kill threat
You cannot win without creatures
P/T Set Number 187 Language Italiano Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (9/20/2024) Survival abilities (and other abilities that trigger at the beginning of your second main phase) will trigger at the beginning of the second main phase you take in a turn
Now that the decklist for the Undead Unleashed preconstructed deck has been spoiled, we know which Zombies didnt make the cut
Add on Karumonix's ability to refill your hand with Rats , and you've got a stellar Rat commander