If you want to push Adventures a bit further, specific Adventure decks also did well during Throne of Eldraine's reign over Standard
To get there, theyre using a variety of mana accelerant cards like Seething Song or Mana Geyser, and pairing them with cost-reducers and ways to draw cards while comboing off
Similarly, old werewolves transformed back to their front side when a player cast two spells on any turn, while new werewolves transform back when it becomes day, which only happens if a player casts two spells on their own turn
Lightning Greaves and/or Swiftfoot Boots can keep Meren itself safe, and the likes of Sol Ring, Kodama's Reach, Explosive Vegetation, Commander's Sphere and Birds of Paradise are all solid mana ramp options
if you want a general zombie commander, there are better options