Izzet Delver
A Legacy deck, by Excel0679
2nd place at a tournament in Magic Online on 2020-08-15

Maindeck:

Creatures
1 Brazen Borrower
4 Delver of Secrets
4 Dreadhorde Arcanist (Banned in Legacy)
2 Ethereal Forager
2 Sprite Dragon
1 Young Pyromancer

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

Sorceries
1 Chain Lightning
4 Ponder
3 Preordain

Basic Lands
2 Island
1 Mountain

Lands
1 Bloodstained Mire
3 Flooded Strand
4 Scalding Tarn
3 Volcanic Island
4 Wasteland

Sideboard:
1 Null Rod
1 Blood Moon
2 Abrade
1 Flusterstorm
1 Hydroblast
2 Pyroblast
2 Submerge
2 Surgical Extraction
1 Narset, Parter of Veils
1 Blazing Volley
1 Rough