The phrase 'night shadow' would be translated as 夜ã®å½± (yoru no kage) in Japanese. This may also be used to mean 'shadow of the night'.
akai kage
Kage no suteppu
kageno masutaa
Kage Senshi
Kage no pansā
kage kitsune
hayai kage
'Shadow circle' may be translated aså½±ã®ä¸¸ (kage no maru) in Japanese.
'Death shadow' is死の影 (shi no kage) in Japanese, and may also be translated as 'shadow of death'.
(Shinpi-tekina kage)
You may say 'yoru.'
there is no such thing as multi shadow tails. you can't just make up random phrases and expect them to be translated to japanese.