Lurrus Jeskai Delver
A Legacy deck, by CNewman
3rd place at a tournament in Magic Online on 2020-04-30

Maindeck:

Artifacts
4 Mishra's Bauble

Creatures
4 Delver of Secrets
4 Dreadhorde Arcanist (Banned in Legacy)
3 Meddling Mage

Instants
4 Brainstorm
4 Daze
2 Force of Negation
4 Force of Will
4 Lightning Bolt
2 Swords to Plowshares

Legendary Creatures
1 Lavinia, Azorius Renegade

Sorceries
4 Ponder
1 Preordain

Lands
4 Flooded Strand
1 Plateau
4 Scalding Tarn
3 Tundra
3 Volcanic Island
3 Wasteland

Legendary Lands
1 Karakas

Sideboard:
2 Engineered Explosives
2 Tormod's Crypt
2 Winter Orb
2 Seal of Cleansing
1 Pyroblast
2 Red Elemental Blast
2 Swords to Plowshares
1 Lavinia, Azorius Renegade
1 Lurrus of the Dream-Den (Banned in Legacy)