Would most Looney Tunes character be primary or secondary Red? Most of them are pretty impulsive and very emotional, even the more measured characters like Bugs Bunny and Marvin the Martian throw a fit and attack people regularly.

Certain genres lean toward a certain color like horror and black.

in blogatog world, could you have a card titled something like "unspeakable horror" and then it's implied to be a banana?

That’s how we’d have to do it. : )

“All Magic sets have some humor, but Duskmourn is a horror set at its core.”Just curious, how does this compare to OG Innistrad?

They’re playing into different aspects of horror, but both are trying to be scary.

Why does the new Urza card become a planeswalker by merging with the Mightstone and the Weakstone? I thought that in the story Urza's spark ignited due to him setting off the Sylex Blast (ie at the horror at what he had done). Wasn't it KARN who became a planeswalker using the Mightstone and Weakstone?

The mightstone and weakstone became his eyes when that change happened.

“Many adults like bright offbeat silly things.” That’s all well and good, but it creates pretty huge tension when those things are in the same universe as say legends horror of horrors. Mtg is trying to please too many things at once.

Magic needs to have a huge amount of variety to allow each player the ability to design the deck that matches what they want. If you don’t like silly, don’t play with the silly cards. (We tend to keep the sillier things away from tournament play.)