Each Mystery Booster: Convention Edition booster pack contains fifteen cards: fourteen from the gigantically awesome main set, and one from that "something new and surprising" group of R&D Playtest cards.
This provides another key blocker against the likes of Mono-Red, and using Aether Vial to cheat this in at instant speed can deal with a stocked dredge graveyard
Because it can single-handedly decide games, though, it still makes sense to include the card in almost any deck
Build your gallery as you scan, then export your collection anytime to Excel or JSON
Everyone remembers the Mono-Red Dragonstorm deck Mark Herberholz, Gabriel Nassif, and I ran the tables with later that year
My personal take on this deck is that it has all of the makings of a successful tier 1 deck, but it might need to see a few revisions to have a shot at being the absolute best