A brief run through of the game's mechanics & interface. If you came here from the (uncredited) Bloomberg report the game has gone through major changes since then. Battles like the one seen above can be sped up so grinding isn't a slow chore and there are plenty more servants than there were before.
*Updates for Summer 2017 English Release:
Announcement:
https://twitter.com/aniplexUSA/status/853322170025603072
No Account Transfers:
https://twitter.com/tononet/status/853322855446044672