On top of that, the colors have plenty of good permanents to sacrifice and recur, making Muldrotha, The Gravetide a fantastic, and popular, Sacrifice commander
The big old load of text on this card reads, Whenever an opponent sacrifices a nontoken permanent or discards a permanent card, you may put that card from a graveyard onto the battlefield under your control. Its just a good way to keep getting more value out of your discard and sacrifice effects, and youve got a lot of them to use
Even with that drawback, it is still a very strong ability to have on a land
To make him, I only had his Cover ability to go on
While the card is easily broken, its more along the lines of Bolass Citadel than it is Griselbrand
Yet, were also treated to some lifegain and an alternate mode of Plummet