Look at the top of the wiki page.I know I read it, but even if it is a "bonus story", it was made by the same people, published by the same company. I see no reason why it couldn't be of some use, except for the fact that very little is actually known about shadowbending. It would be cool to see a "ShadowWarp" tho.
"The following information is not considered canon."
On the issue's wiki page this is said.
"It is considered non-canon due to its placement under the "Bonus Stories" section of The Lost Adventures."
Not saying the idea isn't bad, just said it is not canon.