Temur Delver
A Legacy deck, by Sandydogmtg
3rd place at a tournament in Magic Online on 2020-07-16

Maindeck:

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

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

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

Sorceries
1 Chain Lightning
4 Ponder
1 Preordain

Lands
1 Flooded Strand
3 Misty Rainforest
2 Polluted Delta
3 Scalding Tarn
3 Tropical Island
3 Volcanic Island
4 Wasteland

Sideboard:
1 Grafdigger's Cage
1 Null Rod
2 Winter Orb
1 Sylvan Library
2 Abrade
2 Pyroblast
1 Red Elemental Blast
1 Submerge
2 Surgical Extraction
1 Klothys, God of Destiny
1 Rough