I disagree with what you said about the green phyrexians, that they are like a disease, and thus natural. Phyrexia's whole thing is that nature is weak, and that it must be improved through artificial means (compleation). This is shown by the flavor text of carrion call, which shows that infect (and therefor phyrexia) is very unnatural.

The Phyrexians usurp nature. I was just saying that they themselves weren’t an artificial creation.

In response to the Carrion Crow/Black Cat art similarity question,... I thought making sure art wasn't similar was a big priority for you guys. I seem to remember somebody talking about how important it was to be able to recognize art at a glance, especially across the table upside down.

It is never our goal for cards arts to look similar. I was just pointing out that stopping the occasional overlap is harder than it might seem.

Where are bees in the color pie? As non carrion insects they are green but green isnt supposed to do flying which bees do. Are they relegated to black?

I’d say black or white depending on how you want to portray them. Note so far they’ve only shown up in green.