Niv-Mizzet Reborn
A Pioneer deck, by Tetsubou
2nd place at a tournament in Magic Online on 2020-01-12

Maindeck:

Creatures
1 Hostage Taker
1 Hydroid Krasis
2 Siege Rhino
4 Sylvan Caryatid

Instants
2 Abrupt Decay
1 Kolaghan's Command
1 Silumgar's Command
1 Utter End

Legendary Creatures
3 Niv-Mizzet Reborn
1 Questing Beast
1 Tolsimir, Friend to Wolves

Legendary Enchantments
1 Oath of Kaya

Legendary Planeswalkers
1 Nahiri, the Harbinger
4 Teferi, Time Raveler (Banned in Pioneer)
1 Vraska, Golgari Queen

Sorceries
4 Bring to Light
1 Cut
1 Deafening Clarion
1 Discovery
1 Dreadbore
1 Supreme Verdict

Basic Lands
1 Forest
1 Island
1 Mountain
1 Plains
1 Swamp

Lands
1 Blood Crypt
1 Botanical Sanctum
1 Breeding Pool
4 Fabled Passage
2 Godless Shrine
1 Hinterland Harbor
1 Opulent Palace
1 Overgrown Tomb
1 Sacred Foundry
1 Sandsteppe Citadel
1 Scattered Groves
1 Steam Vents
1 Stomping Ground
2 Temple Garden
1 Watery Grave
1 Woodland Cemetery

Sideboard:
1 Knight of Autumn
3 Rest in Peace
2 Infernal Reckoning
1 Lavinia, Azorius Renegade
1 Surrak Dragonclaw
1 Kaya, Orzhov Usurper
1 Psychic Intrusion
1 Rakdos's Return
1 Supreme Verdict
1 Thought Distortion
2 Thought Erasure