Its a lot easier to generate counters on some permanents than others, and so being able to redistribute them in partial amounts (without relying on dumping them all on the Ozolith when stuff dies) unlocks some nice gameplay synergies
The other two card types provide other ways to affect the game
Fortunately, there are ways to cheat, like playing many changelings or cards like Arcane Adaptation to make everybody in your deck a doctor
This slot is going to have some wild variance, but remember that 65.8% of packs, or just about two out of three, will have a foil Retro Rare, not even a foil anime version of a card
The mechanics weren't placed based on color (mostly) but based off the creature, again I made clear that this was an unbalanced set and had many color pie breaks again read the intro
Push the Limit: Mass reanimation, with haste, and auto-crewing