Here is another deck build of the Golgari guild that relies solely on the Undergrowth mechanic and related graveyard shenanigans. Stitcher’s Supplier lets you fill up your graveyard early with creatures to feed the Charnel Troll which is the main early threat of the deck. The rest of the components are mostly basic and that I have only added Necrotic Wound as the sole non-creature spell in the list. See the decklist below.

Lands
6 Forest
4 Swamp
2 Memorial to Folly
4 Woodland Cemetery
4 Overgrown Tomb
2 Golgari Guildgate

Creatures
2 Izoni, Thousand-Eyed
1 Midnight Reaper
2 Jadelight Ranger
1 Isareth the Awakener
4 Stitcher’s Supplier
3 Molderhulk
3 Charnel Troll
3 Ravenous Chupacabra
3 Glowspore Shaman
3 Llanowar Elves
2 Golgari Findbroker
3 Plaguecrafter
4 Merfolk Branchwalker

Spells
4 Necrotic Wound