Talk:Main Quest: S I N/@comment-36946594-20190104045722/@comment-35520170-20190104053246

It can be cleared with F2P Servants and CEs, good supports, and CS revives. One thing to note is that your seals regenerate even in battle, so theoretically you can stay in battle and wait for your seals to refill for as many revives as you need.

If you're talking about clearing the whole thing from start to finish as F2P in time to do the current event, maybe not.