Theyre just stuff that isnt meant to exist but exists anyway

Theres 3 categories for these stuff:

Physical: Stuff like the thing that forms Aqua Resin

Biological: Living beings that are not meant to exist/from another universe

Lucid: Dreams/Hallucinations that have their own mind.

There are 5 (theoretical) ways that Paradox stuff can enter the earth:

1. Physical & Biological: Grid Rifts (basically rifts from different universes with different physics)

2. Biological: Ruins from the Aegis Meteor (context: the earth used to be normal until this thing struck it)

3. Physical & Lucid: Explosions (yeah)

4. Lucid: The Mindspace Machine (basically a machine someone invented to explore someone's conscience as physical space,)

5. Lucid: The Affliction

It is not recommended to interact with Paradox stuff because theres a risk of losing your life.