mystevious
A combination of mystery and devious. Used to describe a person whose actions and plans are both mysterious and devious, especially as it relates to business matters.
"Rick's corporate organization is so complex that the only word I can use to describe both it and him is mystevious.

Here's the way it appears to work: he owns all of Acme 1 Inc. in which he has invested $25,000. Acme 1 owns 51% of Acme 2 which has outside investors that invest $25,000 less a dollar in Acme 2. Acme 2 then invests all of the proceeds in Acme 3 in return for 51% of Acme 3. Again Acme 3 has outside investors that put in cash equal to the amount Acme 2 has invested less a dollar.

By the time Rick has incorporated Acme 12, he controls (absolutely) a company that has $51,197,953.00 of cash on hand with an initial investment of just $25k. And it's all perfectly legal to boot."