pub const HP_LOW_WATER: &str = "stone.m.hp_low";Expand description
Lowest HP the hero has been at this phase, in permyriad of Max HP
(TR-E03). Absent reads as full health — see hp_low_water.
A low-water mark, not a per-threshold latch: it only ever falls, so every threshold is crossed exactly once per phase however much the hero heals.