That's simple enough provided your opponents obligingly block your vampires

Decklist: Niv-Mizzet, Supreme in Commander Gravitic Punch | Illustration by Randy Vargas Commander (1) Artifact (7) Chromatic Lantern Commander's Sphere Firemind Vessel Isochron Scepter Sol Ring Spectral Searchlight Tome of the Guildpact Battle (1) Creature (13) Bell Borca, Spectral Sergeant Ethereal Usher Goblin Electromancer Guttersnipe Jace's Archivist Melek, Izzet Paragon Mizzix, Replica Rider Murmuring Mystic Netherborn Phalanx Niv-Mizzet, Parun Nivix Guildmage Aragorn, the Uniter Sevinne, the Chronoclasm Enchantment (4) Mindmoil Possibility Storm Smothering Tithe Thousand-Year Storm Instant (21) Assassin's Trophy Bolt Bend Boros Charm Brainstorm Cerebral Vortex Chance for Glory Cyclonic Rift Despark Emergency Powers Izzet Charm Join Shields Narset's Reversal Nature's Chant Prophetic Bolt Rakdos Charm Restore the Peace Signal the Clans Sphinx's Revelation Turn // Burn Wear // Tear Growth Spiral Land (34) Azorius Guildgate Boros Guildgate Command Tower Dimir Guildgate Emergence Zone Forest x4 Ghost Quarter Gruul Guildgate Hallowed Fountain Island x4 Izzet Guildgate Mana Confluence Mountain x4 Pillar of the Paruns Plains x2 Plaza of Harmony Rakdos Guildgate Sacred Foundry Selesnya Guildgate Simic Guildgate Steam Vents Swamp x3 Planeswalker (2) Jace, Wielder of Mysteries Ral, Storm Conduit Sorcery (17) Circuitous Route Epic Experiment Farseek Light Up the Stage Mizzix's Mastery Notion Rain Obzedat's Aid Quasiduplicate Repudiate // Replicate Stitch in Time Supreme Verdict Treacherous Terrain x2 Expressive Iteration Unexpected Results Whispering Madness Wheel of Misfortune This Niv-Mizzet, Supreme deck is a spellslinger deck built around 2-color spells specifically

This adds some good passive late game value to a card that's already helpful in the early game
However, this classic card is too old-school for that
Enchantment - Aura Color tag templates(None) Spirit Mantle Enchant creature Enchanted creature gets +1/+1 and has protection from creatures
I think that if you produce a card that looks like this, wordy and crushed and with abilities that are all struggling for space at the cost, youve probably got to treat that as a symptom of a problem, and youve got to go back to the drawing board and address it