Dredge
A Legacy deck, by Wizard_2002
1st place at a tournament in Magic Online on 2020-07-16

Maindeck:

Artifacts
4 Lion's Eye Diamond
1 Lotus Petal

Creatures
4 Golgari Grave-Troll
4 Golgari Thug
4 Ichorid
4 Narcomoeba
1 Ox of Agonas
2 Putrid Imp
4 Stinkweed Imp

Enchantments
4 Bridge from Below

Legendary Creatures
1 Hogaak, Arisen Necropolis

Sorceries
3 Breakthrough
4 Cabal Therapy
3 Careful Study
4 Faithless Looting

Lands
4 Cephalid Coliseum
2 City of Brass
3 Gemstone Mine
4 Mana Confluence

Sideboard:
1 Lotus Petal
1 Ashen Rider
2 Wispmare
2 Leyline of Sanctity
3 Leyline of the Void
1 Chain of Vapor
2 Nature's Claim
1 Oko, Thief of Crowns (Banned in Legacy)
1 Dread Return
1 Shenanigans