Kaslideoscope

The Kaslideoscope is a Single-Triple T-Spin shape.

Kaslideoscope
Note: You need to change directions for the 3rd and 4th rotation on the first piece. For the first piece in this example, the T is rotated twice clockwise and then twice counterclockwise.

Empty Field Setups
Though slightly impractical.. one can also open with it.