While it's true that this opens you up to potential blowouts when they wipe the yard with cards like Bojuka Bog or Tormod's Crypt, remember that we're going to be drawing extra cards, too, and we'll be putting cards into the graveyard on most turns, meaning we can recover from a Bog (or Draugr Necromancer) fairly quickly
Bring any original packaging, sleeves, and certificates of authenticity, and if you have professionally graded cards (PSA, BGS, CGC), bring the slabs too
This artifact creature can see play in many different EDH decks, and theres a few synergies with pingers like Ob Nixilis, Captive Kingpin, even in Standard
McAfee: Drug
If you do manage to defeat the Battle, it transforms into a four-power copy of a Creature in a graveyard, which is a massive swing