Decontextualization happens when an item is submerged in exotic fluid. the item will be removed from the world and added to a list.

on Recontextualization, an item will be taken from the list (referred to as the well) and brought back into the world.

If a player dies in the liminus dimension, their entire inventory (non respective of if keep inventory is enabled) will be decontextualized and added to the well.

Exotic fluid crystals are capable of Recontextualizing one random itemstack from the well.

The Decontextualization damage type ignores all armor, enchantments, potion effects, and shield. and is dealt by being submerged in exotic fluid or by being outside during an exotic fluid storm

Recontextualization for entities only happens for the player at full attunement. Recontextualizing the player at said player's spawnpoint.