Niv's Prowess Storm

An aggressive Izzet spellslinger deck led by Niv-Mizzet, Visionary (used because Bria, Riptide Rogue is not available in the collection) that uses cheap instants and sorceries to trigger prowess-style creatures, draw cards, and finish with burn or giant token swings.

Niv-Mizzet, Visionary turns every instant or sorcery into a card draw trigger, which often leads to more spells. Zada, Hedron Grinder copies a cantrip like Expedite or Monstrous Rage for every creature, so each copy pumps your team and draws cards, while Soulblade Djinn and Emberheart Challenger make even small spells grow your attackers. Thousand-Year Storm and Rite of the Dragoncaller multiply your spells into token swarms, then Niv's commander damage or an overwhelming attack closes the game.

Keep a hand with two or three lands and at least one cheap spell, preferably a one-mana cantrip or interaction. A hand with no one- or two-drop action is too slow. Mulligan hands with only expensive cards, lands that enter tapped too early, or no way to make both blue and red mana.

Early: cast a cheap prowess creature or a cantrip to smooth your draws. Mid: land Niv-Mizzet, Visionary and start chaining spells, using removal and counters to protect your life total and commander. Late: use Thousand-Year Storm, Rite of the Dragoncaller, or Zada to turn a single spell into a huge board, then swing with flying or unblockable creatures. Copy spells and extra combat effects help end the game before opponents can stabilize.

Niv-Mizzet, Visionary is central to the draw engine, so instant-speed removal or counterspells can stop your chain. The deck is vulnerable to board wipes because it relies on accumulating a wide team. It also has few proactive life-gain or defensive tools, so fast aggro and decks that can keep your commander off the board are dangerous. Hold up protection and try to resolve Niv when the opponent is tapped out.