We tried out the three starter decks releasing at launch, and they each had distinct strategies based on their ink color
Its not quite Mind Rot, but it gets either two lands or a spell, which is a bit better than your opponent discarding an excess land
It also comes with 8 booster packs to expand your collection and give you more options for your decks
In the end it was worth it to decks that benefit the most from its presence, especially with Land Tax or Tithe, and every now and then someone else got to use it
He argued that it would still have two colored mana so it wouldn't be easy to splash outside of a dedicated blue-black deck
Losing access to green means you wouldnt get to play a beautiful foil Cartographer or any of the other green explorers, but if thats not a dealbreaker, Ive put a rough list together for this build over on Archidekt