Lets exclude all gold cards, hybrid cards, or white double-faced cards that transform into cards of other colors (sorry Brutal Cathar/Moonrage Brute)
As we would expect any Yarok deck to play a significant number of creatures and artifacts that have ETB abilities, it's a no brainer to add another artifact that will add an additional trigger, giving you potentially three of every trigger
Carnage, Crimson Chaos Carnage, Crimson Chaos sold me on the mayhem mechanic
Thief of Blood | Illustration by Cynthia Sheppard Counter-removing cards take counters off players or permanents
At best it is now backup for when you don't have the ideal targets you wanted
Jokes aside, this is a useful effect to have access to if youve got big spells to protect