What is the real reason that prompted me to undertake it
However, that was just reprinting six cards, and there are hundreds of new cards in the 40k commander decks - not to mention that the Astartes, Necron and Tyranid creature types are part of Games Workshop's intellectual property, so presumably can't be reused without their license.
Yawgmoth's Will can be an absolute terror when played right, especially since it exists in the color that cares most about the graveyard
What does Impact Tremors do
Even having a Grim Poppet, Sturdy Hatchling, Heartmender, or other creature that can remove -1/-1 counters from itself will often be enough for us to start proliferating provided we have a payoff like Flourishing Defenses or One with the Kami in play
For all things sticker-related, check out Rosewaters post on his Blogatog