Jund: With Jund, you have two main options: first, you can embrace the ramp theme, improve the finishers, and play a good-stuff / ramp deck
Having several cute forest animal friends nearby is also improving the ranking here
Many cards, such as artifacts and creatures, can tap for mana just as a land can
I do want to talk about some honorable mentions
Contents: 100-card ready-to-play The Lost Caverns of Ixalan Commander Deck
Since Archfiend only gets only counters when it enters the battlefield, the end result if that the opponent will have an Archfiend of the Dross with no oil, so you simply pass the turn and make your opponent die to Archfiend of the Dross's ability when they can't remove a counter on their upkeep