If it werent, or if they still had the banned as a commander distinction, Im confident this Sultai commander would still be legal, since Narset, Parter of Veils is essentially doing the same thing
If you want to try it out for yourself, a link to the publicly accessible download can be found on Kolevs Twitter
It is one of the many prize cards that allow you to win the match by attacking with a specific monster (in this case Pendulum)
IRENCRAG FEAT One of the most recent printings on the list, this was a pretty tough card to evaluate when it came out, and were only now starting to see it utilised more in various formats
By the time the two sides enter the Kalos region, their rivalry earns an In-Universe "Holy Shit!" Quotient from the locales, just from the ridiculous skill and power displayed from an unfanfared rookie and a bunch of small time criminals
The downside of the card is that it takes a bench spot and, with Dedenne GX still in the format, space is limited