3 Teval, The Balanced Scale = Infinite Death Triggers Commander The main commander of the Sultai Arisen preconstructed deck, Teval, the Balanced Scale is an enabler for an infinite loop that does a lot for you in a game of commander
The deck needs a fair amount of tweaking to be competitive in most pods, but thats to be expected from precons
Its the usual suspect when it comes to combo decks: Urza, Lord High Artificer
As such it does a lot of work in demonstrating quite how significant of a difference there is between a 2 drop and a 3 drop actually is
Sometimes, white deals with a creature (and sometimes a permanent) not by removing it from the battlefield but by neutralizing it
It's the only four cost Black removal spell, so it's a key card here