Opponents casting their own spells also fuels you, making Niv-Mizzet uniquely resilient the more the table interacts, the more cards you draw and the more damage you deal
Pre-release Raichu 8
The more cards in your graveyard, the more options you have
A Real Handful Aang, A Lot to Learn Aang, the Last Airbender Abattoir Ghoul Abbey Gargoyles Abdel Adrian, Gorion's Ward Aberrant Aberrant Manawurm Aberrant Mind Sorcerer Aberrant Researcher Abigale, Poet Laureate Abominable Treefolk Abomination Abomination of Llanowar Abomination, Terrifying Titan Absolving Lammasu Abstract Iguanart Abstract Paintmage Abu Ja'far Abuna Acolyte Abundant Maw Abyssal Gorestalker Abyssal Nightstalker Abyssal Specter Abzan Battle Priest Abzan Beastmaster Abzan Falconer Abzan Kin-Guard Academy Researchers Accorder Paladin Accursed Horde Accursed Witch Acid Web Spider Acid-Spewer Dragon Acidic Slime Acidic Slime Acidic Sliver Acolyte Hybrid Acolyte of Affliction Acolyte of the Inferno Acquisition Octopus Acquisitions Expert Adanto Vanguard Adarkar Sentinel Adarkar Windform Adelbert Steiner Adeliz, the Cinder Wind Adrenaline Jockey Advanced Stitchwing Adwal, Breaker of Chains Aegar, the Freezing Flame Aegis Sculptor Aerial Engineer Aerial Responder Aerial Toastmaster Aerie Mystics Aerie Worshippers Aeronaut Admiral Aetherborn Marauder Aetherplasm Aethershield Artificer Aethertorch Renegade Affa Guard Hound Affectionate Indrik Afflicted Deserter Aftermath Analyst Agatha's Champion Agency Outfitter Agent 13, Sharon Carter Agent Maria Hill Agent of Acquisitions Agent of Erebos
To do this, you will need 4 (in some cases 6) bonus cards
Nowadays, Standard legal cards printed with the same effect come in at a cost of five CMC (converted mana cost)
