Golden bunny

The golden bunny, lacking a more specific name, is a rare species of rabbit found in Subterranea with shiny golden fur. Golden bunnies have a strange power: when a creature sees one, then no longer sees it, they forget that it existed. For this reason, golden bunnies aren't actually known to humanoidkind. A few mysteriously similar hand-drawn pictures of them found in completely different areas are the only evidence of their existence, leading to tales and rumors about a mythical creature associated with good fortune.