Use the Lotus to tap for triple black, then untap it for one mana with the Staffs first ability, draw your entire deck (thanks to Staff of Domination), cast an infinitely large Exsanguinate or Torment of Hailfire and youre done
Well of course you do
Massacre Wurm is the kind of card that slots into a fair few archetypes, from Aristocrats to Control, and one that helps some of those decks achieve a higher level of consistency
This is an incredibly useful card to use early when there aren't many cards in the player's graveyard, so they can increase the chances they get what they want
If that spell is countered, prowess will still resolve
Even in a depowered deck, you can find Salt Marsh, Jwar Isle Refuge, Frost Marsh, and Secluded Glen to make the other colors in a deck built around The Mimeoplasm or something