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.

Kaslideoscope MTD
The T-Spin Double can be converted to a T-Spin Triple or Imperial Cross (diagrams 2 and 3 respectively) if one's overhang is 1 block high.