The "Shadowless" version refers to the very first print run of the English Base Set in 1999, where cards did not feature the shadow around the Pokmon's illustration
Sure, 4 mana is considered a little above average for reanimation strategies, but once you start pairing this commander with Training Grounds and Cabal Coffers, you can create several potent tokens a turn, then use your new Zombies to filter through the top of your deck during your upkeep to find the card you need to close the game
If we were to trace a parallel with paper Magic, Historic would be similar to Legacy, while the Timeless format is more akin to Vintage, in which all card are available and only a few have restrictions
Its just a pain to play with, and it has been banned from every format just to improve the lives of everyone involved
LIKELY BEST CASE SCENARIO In a few months, WotC will chase you off this blog, and off google code
First, the set prioritizes coolness over complexity