Yorion Four-Color Control
A Legacy deck, by GraciasPortanto
3rd place at a tournament in Magic Online on 2020-05-14

Maindeck:

Artifact Creatures
4 Baleful Strix

Creatures
2 Snapcaster Mage

Enchantments
4 Abundant Growth

Instants
4 Abrupt Decay
4 Brainstorm
4 Force of Negation
4 Force of Will
4 Swords to Plowshares

Legendary Creatures
4 Uro, Titan of Nature's Wrath

Legendary Planeswalkers
2 Jace, the Mind Sculptor
4 Oko, Thief of Crowns (Banned in Legacy)

Snow Artifacts
4 Arcum's Astrolabe (Banned in Legacy)

Snow Creatures
4 Ice-Fang Coatl

Sorceries
4 Preordain

Basic Snow Lands
4 Snow-Covered Forest
6 Snow-Covered Island
1 Snow-Covered Plains
1 Snow-Covered Swamp

Lands
4 Misty Rainforest
4 Polluted Delta
4 Prismatic Vista
1 Tropical Island
1 Tundra
1 Underground Sea

Legendary Lands
1 Karakas

Sideboard:
4 Null Rod
4 Meddling Mage
3 Veil of Summer
1 Yorion, Sky Nomad
3 Dead of Winter