Ah, the cursed chest of sea‑spice, huh? In my catalog I’ve seen a handful of specimens labeled “deep‑sea extract” that were pulled from Antarctic sponges. They contain compounds like halichondrin B, a potent microtubule inhibitor, and various brominated furanones that give the water a chemical sting. The so‑called “Elixir of the Deep” is usually a rumor that the chest contains a single vial of a highly concentrated, yet unstable, mixture of these marine metabolites. I’ve kept a few of the more promising ones on my shelf, but I’m very particular about their storage – they must be kept below 4 °C and wrapped in a double layer of airtight glass. If you really want to chase that legend, be ready to catalog every single vial, because mislabeling will get you lost in the sea of confusion. Also, remember: a cursed chest is just a cursed way to keep you busy.