Jegantha Temur Delver
A Legacy deck, by silviawataru
3rd place at a tournament in Magic Online on 2020-05-21

Maindeck:

Creatures
4 Delver of Secrets
4 Dreadhorde Arcanist (Banned in Legacy)
2 Hooting Mandrills

Instants
4 Brainstorm
4 Daze
2 Force of Negation
4 Force of Will
4 Lightning Bolt
2 Spell Pierce
1 Vapor Snag

Legendary Planeswalkers
3 Oko, Thief of Crowns (Banned in Legacy)

Sorceries
1 Chain Lightning
4 Ponder
2 Preordain

Lands
1 Fiery Islet
4 Flooded Strand
4 Polluted Delta
3 Tropical Island
3 Volcanic Island
4 Wasteland

Sideboard:
2 Winter Orb
2 Tarmogoyf
2 Tin Street Hooligan
1 Sylvan Library
2 Pyroblast
2 Red Elemental Blast
2 Surgical Extraction
1 Jegantha, the Wellspring
1 Blazing Volley