Why are there no MindFlayer / Illithid in magic? I was contemplating on which color pair had as a sort of pivotal fantastical/mythical creatures from original ravnica that posed as leader. I found myself on a wall remembering the Dimir one. Apparently original Ravnica had a vampire as a leader, while later on it had a shapeshifter. I noticed that while vampires tend to lean more to black , shapeshifters tend to lean more to blue. A Mindflayer would have been perfect as a leader of Dimir.

Now, why can't Wizards of the Coast use Illithids in Mtg? Wizards owns both Mtg and DnD, so where is the problem? Also, Blizzard seemed to navigate around that by creating faceless who tend to do the same thing.