Super rare, ultimate, ultra premium one character - IDN - domain.
ꓮ = xn--ym8a IDN character = punycode
A (a) = A (a)
keyboard character(s) = keyboard character(s)
ꓮ ≠ A (a)
IDN character ≠ keyboard character(s)
+++
You can copy / paste the IDN character into the URL to 'write' it.
Or you can set it as clickable, (high) attention - generating link.
It's an absolute awesome IDN - domain, usable for any website or as a mindblowing forwarder.