What's more: What happened to your opponent doesn't matter, either
Collector Boosters are the best way to collect variant rares and mythic rares, as well as foil cards, and they're the only place to collect foil-etched, extended-art, and neon ink cards
Not only did Vivi get banned in Standard, in part due to its interaction with Agatha's Soul Cauldron (although, as Wizards mentioned in its ban announcement, Vivi might have ended up broken even without its artifact friend), it's even more annoyingly strong in Commander, which I think is actually more damaging to the game overall
Battery-operated shufflers have been known to malfunction, but users of this product say even when used several times a week, it still works perfectly.