Shadow Cannon is a single-bag T-Spin Double opener created by westl that resembles a TKI 3 Opening, except the S/Z piece is placed vertically. The dependencies are I before Z and L before S, or if mirrored I before S and J before Z. In the best scenario, it can achieve Perfect Clear after 8 lines which leads into a potential DPC loop or Perfect Clear after 10 lines. It can be used as an Anti-Perfect Clear opener due to the fact that the first TSD can be built quickly, or simply an opener that sends a quick attack at the very start of the game, like Stickspin.

First Bag

First Bag

Residue

Setup rates are 25% on one side, or 50% when counting both orientations.

Continuations

Early O Piece

This is one of the best cases. Here, the second bag will mostly be stacked the same way.