PLAYED Shows obvious and persistent dirt (grease marks, black dots, sticky residues, dust that is not easily removed) that remains visible even after attempts to clean, but does not affect playability
So if you have an 'Afterlife 2' creature die, and Teysa Karlov doubles the death trigger, you'll make two Spirits and then another two Spirits, rather than four all at once
Its limited life, potential for massive number of creatures, and the fact that all of them die every turn just begs for one or more of the enhancements that follow ENHANCEMENTS: The Stairwell needs creatures that die easily, and enchantments that take advantage of creatures leaving/coming into play
The four things that decide it and why most people get this wrong
There are two big lessons here
Small nod to Counter Blitz for having a literal 3-card infinite damage combo in the deck