It seems Yu-Gi-Oh! players of all walks of life are starting to realize the value of the Mitsurugi archetype. With Konami’s update to their Forbidden/Limited list and players scrambling to reshape their decks, the market is now reflecting this change in priorities.
Mitsurugi Ritual Stock Value Heading Up

The Mitsurugi archetype is a Trading Card Game (TCG) exclusive archetype specialized in Ritual Summoning. Given the nature of its central mechanic, its main component is the ritual spell card, Mitsurugi Ritual.
This card and the rest of its roster were released in the Supreme Darkness expansion back in January of this year.
With Ryzeal and Maliss dominating the meta and most organized tournaments, Mitsurugi Ritual fell into obscurity, where anyone could pick up a copy for about $12 last month.
Some intrepid deck builders took advantage of this low price at the time and have seen various degrees of success pairing up the engine with competitive leaders like Ryzeal.
With the archetype being vetted by its performance in various regional Yu-Gi-Oh! Championship Series (YCS) around the world, we now have Mitsurugi Ritual going up as it’s now sitting at an average market value of $40.
Thankfully, the rest of the pieces aren't subject to price-gouging for the moment. Seeing as Mitsurugi Ritual is the heart and soul of the archetype, however, anyone interested would have to fork over at least $100 for a full play set.
This is assuming that the current price trend just plateaus at this point.
The Future of Mitsurugi

Unfortunately for anyone interested in using this archetype, its TCG exclusive nature means gauging its actual performance is very limited for the moment. Adding to this, we have Konami’s latest announcement of new Mitsurugi support coming in their latest expansion, Alliance Insight, next month (May).
Two cards in particular, Mitsurugi no Mikoto, Aramasa and Mitsurugi no Mikoto, Aramasa, are sure to garner optics as they add a lot of consistency (the former) and an extremely broken combo starter (the latter) for the Mitsurugi archetype.
That said, Konami has yet to reveal their rarity values. So anyone keeping an eye on Mitsurugi or is already playing it, may want to grab some copies of Alliance Insight the day of its release, if they haven’t pre-ordered some already.