Four-Color Saheeli
A Pioneer deck, by RVNG
2nd place at a tournament in Magic Online on 2019-11-03

Maindeck:

Artifacts
2 Prophetic Prism

Creatures
4 Elvish Mystic
4 Felidar Guardian (Banned in Pioneer)
4 Gilded Goose

Enchantments
1 Detention Sphere

Enchantment Creatures
2 Courser of Kruphix

Instants
2 Abrade
2 Wild Slash

Legendary Enchantments
2 Oath of Chandra
4 Oath of Nissa

Legendary Planeswalkers
3 Oko, Thief of Crowns (Banned in Pioneer)
4 Saheeli Rai
3 Teferi, Time Raveler (Banned in Pioneer)

Sorceries
1 Supreme Verdict

Basic Lands
2 Forest

Lands
4 Botanical Sanctum
4 Breeding Pool
2 Hallowed Fountain
3 Inspiring Vantage
2 Sacred Foundry
3 Spirebluff Canal
1 Stomping Ground
1 Temple Garden

Sideboard:
1 Detention Sphere
2 Rest in Peace
3 Mystical Dispute
1 Negate
2 Veil of Summer (Banned in Pioneer)
1 Chandra, Torch of Defiance
1 Jace, Architect of Thought
2 Deafening Clarion
2 Supreme Verdict