If you want to go for a more combo-focused route, Bonus Round is a solid inclusion too
These effects call under two broad categories: cards that return lands from the graveyard to the battlefield as part of a spell or activated ability (Tato Farmer, Splendid Reclamation) and cards that allow you to play lands from your graveyard (Crucible of Worlds)
There's no limit on the number of ongoing schemes you can have face up in your command zone, and having one or more ongoing schemes in your command zone doesn't stop you from setting a scheme in motion at the beginning of your first main phase
The obvious play here is to draw into Thought Sponge when someone else wheels, like with Wheel of Fortune or Windfall
Due to the high volatility rates, we do recommend checking the included links for TCGPlayer if you are curious about the current values of each card and how they may have changed since this was written
Upon dying, Worldspine Worm splits its power into three creatures, creating three 5/5 Wurm tokens