Yorion Four-Color Control
A Legacy deck, by CoolUser
5th place at a tournament in Magic Online on 2020-05-21

Maindeck:

Creatures
2 Snapcaster Mage

Enchantments
4 Abundant Growth
2 Counterbalance
2 Sylvan Library

Instants
4 Brainstorm
1 Counterspell
3 Force of Negation
4 Force of Will
1 Pyroblast
1 Spell Pierce
4 Swords to Plowshares
1 Veil of Summer

Legendary Creatures
3 Uro, Titan of Nature's Wrath

Legendary Planeswalkers
1 Narset, Parter of Veils
3 Oko, Thief of Crowns (Banned in Legacy)
1 Teferi, Time Raveler

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

Snow Creatures
4 Ice-Fang Coatl

Sorceries
4 Ponder
4 Terminus

Basic Snow Lands
2 Snow-Covered Forest
3 Snow-Covered Island
1 Snow-Covered Plains

Lands
4 Flooded Strand
4 Misty Rainforest
2 Mystic Sanctuary
2 Polluted Delta
2 Prismatic Vista
1 Scalding Tarn
2 Tropical Island
1 Tundra
2 Volcanic Island

Legendary Lands
1 Karakas

Sideboard:
2 Meddling Mage
1 Scavenging Ooze
2 Blood Moon
1 Flusterstorm
1 Pyroblast
2 Red Elemental Blast
2 Surgical Extraction
1 Veil of Summer
1 Wilt
1 Yorion, Sky Nomad
1 Narset, Parter of Veils