I could see them working with Sneak Attack, but I ended up sliding away from that, keeping new Purphoros who is a little harder to remove but still gives us a cost reduction
You dont want to barge into the LGS during FNM with 4,000 loose cards and seven binders for them to rummage through, so try to contact them first and see when you can drop a collection by for an estimate
The fourth one is the type of card I could imagine some Magic players carrying around in their wallet, waiting for the perfect bar trip to pull it out and spring it on their friend: Ashnod's Coupon
The Ravenous Chupacabra is played in 48,593 decks over at EDHREC.com so it's a clear classic of the format that has tons of uses
Commander, a mostly-casual and multiplayer format, seems to be Magic's solution to the Spikes with killer decks will kill the fun problem, and also the one format where personal expression shines the most