Temur Delver
A Legacy deck, by Mzfroste
4th place at a tournament in Magic Online on 2020-03-15

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

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

Sorceries
1 Chain Lightning
4 Ponder
3 Preordain

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

Sideboard:
1 Null Rod
1 Brazen Borrower
1 Sylvan Library
2 Abrade
1 Hydroblast
3 Pyroblast
3 Surgical Extraction
1 Veil of Summer
2 Rough