Hachispin

Hachispin (or Hachi-Cannon) is an opener created by a Japanese player with the same name. The setup consists of a T-Spin Single followed by a T-Spin Triple and Perfect clear.

First 2 bags
The setup needs an early O piece. A T-Spin Single is made at the end of the first bag and a T-Spin Triple at the end of the second bag.

Under circumstances, the second S piece needs to be soft-dropped. The second L, I and O pieces can be dropped in different ways. If possible, drop the second I piece 2 columns away from the wall because this gives a chance for a Perfect clear.

Perfect Clear continuation
If the second I piece is dropped 2 columns away from the wall, then there's a high chance (69%) to make a Perfect clear (PC) at the end of the third bag (4 further cleared lines) whereas either the third I, L or J piece will stay on hold. The chance is especially high, if T piece comes first in third bag (94%), and also decent if either S, Z or O piece comes first (between 70% and 73%). The PC will always work, if Z and T can be used to fill the bottom rows (see picture 1). Same is true for T and L (see picture 2). Picture 1 shows the most common way to make a PC.

T-Spin continuations
There are also easy ways to make either a T-Spin Double or T-Spin Triple in the third bag. Sometimes, it is also possible to prepare an Imperial Cross.

Examples
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