Five-Color Niv-Mizzet
A Pioneer deck, by Grant Wozniak
1st place at a tournament in Buffalo Grove, Illinois, United States on 2019-12-21

Maindeck:

Creatures
2 Gilded Goose
1 Hostage Taker
1 Knight of Autumn
4 Sylvan Caryatid

Enchantments
1 Detention Sphere

Instants
2 Abrupt Decay
1 Assassin's Trophy
2 Drown in the Loch
1 Kolaghan's Command

Legendary Creatures
4 Niv-Mizzet Reborn
1 Obzedat, Ghost Council

Legendary Enchantments
2 Oath of Kaya

Legendary Planeswalkers
4 Teferi, Time Raveler (Banned in Pioneer)

Sorceries
4 Bring to Light
1 Deafening Clarion
1 Supreme Verdict
1 Thought Erasure
1 Unmoored Ego

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

Lands
1 Blood Crypt
1 Blooming Marsh
2 Botanical Sanctum
1 Breeding Pool
4 Fabled Passage
1 Godless Shrine
2 Hallowed Fountain
2 Overgrown Tomb
1 Sacred Foundry
1 Steam Vents
2 Stomping Ground
1 Temple Garden
2 Woodland Cemetery

Sideboard:
3 Damping Sphere
1 Knight of Autumn
1 Cindervines
2 Dovin's Veto
1 Tolsimir, Friend to Wolves
1 Ashiok, Dream Render
1 Anger of the Gods
1 Spring
1 Supreme Verdict
2 Thought Erasure
1 Unmoored Ego