Creeping Darkness (5e Spell)
From D&D Wiki
|Casting time:||1 minute|
|Components:||V, S, M (a whisker from a black cat and a tiny bottle of smoke)|
|Duration:||Concentration, up to 10 minutes|
You create an amorphous cloud of inky darkness that fills a 10-foot cube. When you cast this spell and as a bonus action each round, you can move the cloud 20 feet. The cloud can enter a hostile creature's space and stop there, and it can move through a space as narrow as 1 inch wide without squeezing. A creature that starts its turn in the cloud or moves into the cloud for the first time on its turn must succeed on a Constitution saving throw or be blinded and deafened until it leaves the cloud.