Astral projection

[Amarok]

There are a couple of problems with your test.

First it assumes one can astrally project at will, the second assumes astral projection somehow makes you clairvoyant.

But it's a silent invisible dragon

Second it's a method (not assumption) built on what people who astro project claim they can do. See stuff while ascended. And yes there are supposed rituals that people frequently use the get consistent results.