Frencore's Silkbound

On death, the mod gathers the whole inventory, including armor and the offhand slot, and seals it inside one cocoon block set at the spot. Each death's loot is sealed into one luminous cocoon block, not left as a heap on the ground, which keeps items safe from fire, lava, water and the void. The filled cocoon glows, which marks the grave across a dark cave. Breaking a cocoon returns its contents to the player, while a cocoon spilled on a solid surface nearby keeps its contents safe as well.

Cocoons also come from new structures. Cobweb-strewn chambers built from silk and cobblestone lie deep underground, appearing in four sizes, from tight dens to wide nests. Inhabited cave spiders and spawners stand inside, making one real fight per clearing. Some nests contain rare loot, and the spider nests carved into caves of the Overworld biome keep the Silkbound threads stocked, so a player can gather wrapping for later trips.

Every player and the server need a copy of the mod. It is released under the MIT License and is not open source. Concept art is based on work by Frencore.