Krystian's Twist is an idea by Krystian Wilisowski, which he posted at the Twisty Puzzles Forum. Krystian worked out how to turn a tridiminished icosahedron into a jumbling twisty puzzle. Actually, his version was more complex with four slices. Carl Hoff suggested that even the jumbling three-slice puzzle could be interesting. This is that three-slice version.
The puzzle has an interesting seven-move jumbling sequence, which cannot be reversed without jumbling. It took me several video attempts to demonstrate it correctly, because the sequence is sort-of hard to remember, see and replicate.
The geometry of this puzzle is a deep-cut edge-turning icosahedron, of which only three of its 15 axes are enabled. It is a little brother of Big Chop, so to say.