-sigh- Commanders emphasis on color identity in deckbuilding has successfully kept Krrik, Son of Yawgmoth from being a huge problem in the format as a whole, but its still a powerhouse that should be removed or countered on sight against decks with a large or exclusive emphasis on black, as 4 mana can easily become as much as 16, more if life gain enters the equation
Nazar, the Velvet Fang -- Although the card draw is nice, the color identity and mana cost limit this card's potential
Decks With Identities There are plenty of more experienced analysts to break down how these mechanics and decks interact with the Lorcana card pool at large, so I'll just focus on my perspective: someone who knew a little about the game going in but was ultimately introduced to proper play through these decks
Hiram Flaversham
Kokusho is huge as a 5/5 flier for 4BB, and when it dies, each opponent loses 5 life, and Kokusho's controller gains life equal to the total life lost
Being able to take the fight to ready characters rather than just those exerted means that no opponents character is safe with the knight on the field