Now that can be a difficult question! Tenyo has produced so many excellent tricks that narrowing it down to just one is challenging.
That being said, perhaps for me, What’s.Next would be the one although I could change my mind over and over again.
Yes, Crystal Cleaver is fantastic and easily could have been my answer. I chose What’s Next because I have performed it so many times over so many years.
Perhaps, the kind of venue one performs in is a determining factor. Anyway, if say one hundred people respond to your question, you may get close to one hundred different choices or at least quite a few.
I hope that no one says T-1 Thimble.