Only 20 copies were ever handed out, meaning this is an incredibly rare prize card
For example, blue decks thrive on casting a lot of spells, while green decks might be about generating massive creatures
So, a card like Green Slime can be a super Naturalize that also invalidates the permanents ETB effect
These cards squeeze all that card draw into a tight window that chokes your opponents out of options
Relic of Sauron You have to be playing a Grixis commander for Relic of Sauron, which is far more restrictive than most mana rocks
The Blue and Green Praetors, Jin-Gitaxias and Vorinclex would also have been exciting to see, and would have made a significant in both that individual game of Pack Wars as well as my collection of potential cards for Commander