According to the PHB, concentration is broken under one of three conditions:
- Casting another spell that requires concentration
- Taking damage and failing the CON save
- Being incapacitated or killed
So my question is, assuming a spell that can be concentrated on for longer than 8 hours, can you concentrate through a long rest?
Best Answer
That depends on whether sleeping gives you the Unconscious condition.
According to the DMG, page 248, sleeping does give you the unconscious condition:
Crawford also says that sleeping gives unconsciousness.
So, you probably can't maintain concentration through a long rest, unless you're an elf! (Because they don't sleep.)