Talk:"Ancient Japan's Got Talent!"/@comment-69.122.93.181-20131210010148/@comment-17760674-20131210030401

^ HP also allows you to make up the floor progress you miss when you find a WG (since when you find one, your health is still deducted, but you make no floor progress) when you level up and get that free HP refill, decreasing the likelihood of having to dive into your item stash.

But yeah, the tower can theoretically be completed with just 9 HP (and you might not even have to sacrifice your health if you've got a few diurnal no-life friends and a few nocturnal no-life friends that you trust) as long as you prepare yourself with items and timers (internal and/or external).