Board Thread:Questions and Answers/@comment-203.81.69.76-20140912100930/@comment-24826500-20141005103055

But ALL four of them in the SAME mission is really really really rare. One such mission is Deflate the Clock. Another is the mission Pass 10 Epic Rounds With Lots o' Cash. Well. That's because all towers are allowed. (Same goes for Three TImes a Charm.)