Darkest Night

You throw the black cloth into the air, causing a 50 square feet area centered on a point within range to be enveloped in an illusion of nightfall. The sky darkens dramatically, mimicking the appearance of a nighttime scene complete with stars and a moon, casting dim light within the area.

Creatures outside the area perceive it as a normal area but see darkness within. Creatures inside the area see everything as dim light, and they gain advantage on Dexterity (Stealth) checks made to hide.

Once the spell ends or you lose concentration, the illusion fades, and the black cloth falls back to the ground at the point where the spell was cast.