raid boss event.
you need 15865 event currency to clear shop.
new 5*.
new event equip .
and new furniture for garden.
limit of 5 turns per one party for bosses from phase 2
looks like you can rise you ATK rate by spending more "boss currency"... interessting.

edit:
just saw, that there are absolutely no infos about todays maintenance or the new event on the discord channel
maybe they abandoned it