The term "supernatural agents" refers to beings or forces that are believed to exist outside the natural world and beyond human control. Full definition
I think you have to have the avowed belief in supernatural agents to be considered a religion, otherwise you get stuff like Objectivism (which is actively anti-religious) counting as a «religion.» (religion.blogs.cnn.com)
The Bunny's appearance was clever because the ink is supposed to serve as a gateway between worlds, so it wouldn't necessarily be impossible to find a clearly supernatural agent of cuteness and destruction there; a random giant robot walking around a foundry asking if Katarina is Sarah Connor just falls flat. (darkstation.com)
Although both schemes see religious or supernatural agents as imposing codes of moral conduct, BSP does not assume a single supreme deity who oversees that process. (scientificamerican.com)