Poisoning
Poison can harm slimes without immunity and briefly prevent their needs from recovering.
Poison begins as a property of a place. On sufficiently toxic ground, a slime without immunity accumulates exposure. Brief contact usually has no effect; only sustained or closely repeated exposure causes poisoning. The slime then loses health, its needs deteriorate, and their normal recovery is temporarily blocked.
Exposure and after-effects
Outside poisonous tiles, exposure that has not yet caused harm begins to fall. Several sources encountered in quick succession can still add up; standing still or fighting on toxic ground is therefore especially dangerous. Once the threshold is crossed, poisoning continues as its own condition rather than being triggered anew on every tile. A step onto safe ground does not end it immediately.
Sources, traces and immunity
Natural poison growths are permanent. Residue from decaying carcasses or Undead that have rested in one place for a long time instead fades and is washed away faster by rain. Either can cause enough exposure for poisoning. Undead are immune to exposure and its harm, and draw sustenance from natural sources; their immunity does not extend to other species.
The Aqua crossed a narrow patch of poison unharmed. When it had to fight among several growths, greenish bubbles showed the rising exposure.
