Cards like Yarok, the Desecrated, Virtue of Knowledge, and Strionic Resonator double your ETB effects
For example, if Warrior is the chosen creature type and you control Bramblewood Paragon, a Runeclaw Bear would enter the battlefield with an additional +1/+1 counter." Even these additional rulings don't add much complexity, and changing or adding Creature types to a card remains pretty straightforward
In Dimensional Psychic, you can easily arrange exclusion zones to make use of these cards, making them a mandatory lower class
Also, there is no room for Lightning Greaves or Swiftfoot Boots in this build
While this card's price history has been tumultuous to say the least, there seems to be significant momentum pushing it back towards the $20 plateau that it fell from
Since it requires a dedicated Grixis manabase, I cant imagine it becoming a multi-deck staple like Karn, Scion of Urza or even Chandra, Torch of Defiance