Its passion can also massively backfire on them, with lots of red cards focused on chaotic, random-chance outcomes, such as Chaos Warp or Warp World shaking up the game beyond what any player could reasonably predict
Theres a sub-theme of dealing damage for instants and sorceries with GuttersnipeGuttersnipe and Thermo-AlchemistThermo-Alchemist, but with only 22 instants and sorceries in the deck, its not exactly a reliable strategy
Infect Infect decks try to win with Poison Counters
You have a high enough legendary count for Delighted Halfling to count among them, with some bonus counterspell protection
A cheap, aggressive threat that turns Relic of Progenitus and similarly efficient graveyard hate into burn engines sounds intriguing to build around and potentially quite powerful
the fact that this tutors for those restricted artifacts means Urza's Saga is restricted in Vintage as well