With the release of the first pre-campaign for lostbelt 6 we got two servants on rate-up, Castoria and Rider Vinci, both important characters to the lostbelt story
We know that the second part to this campaign will come this wednesday with (almost confirmed) banners for both Melusine and Oberon, the latter not having a rate-up for over a year now.
However there is another servant which had an important role in lostbelt 6 as well, and that servant is Senji Muramasa. His last rate-up is even longer than Oberons with almost 2 years now (since January 1st 2021 with the JP schedule) not being available outside of GSSR gachas
Seeing his importance in the story, and Rider Vincis sudden rate-up for this campaign, how likely are we to get a Muramasa rate-up next week?