Multani, Yavimayas Avatar I cant call returning lands to your hand nothing, but I fully expect decks interested in playing Multani, Yavimaya's Avatar to either have a surplus of lands or plenty of effects like Exploration and Burgeoning to get them back in play
In Japan only
Still, there are two non-Pokmon even better
The shocklands do get their own special treatment available only in Collector Boosters borderless versions of all ten of these multicolor-land mainstays
The 4-cost Trafalgar Law has become one of the strongest plays for this deck, giving you interaction with the opponents side of the field while still throwing a body on the field
Granted, this path and the ones involving tokens lean a lot more in the combo direction than the mana acceleration direction, but its definitely worth noting Carnival of Souls capability of being useful outside unreliable 3-4 card loops in these strategies, as it gets a bad rap Im not convinced it fully deserves when reading about its capabilities elsewhere