Trance

Species traitPHBp. 242014SRDElf (Drow)

Elves don't need to sleep. Instead, they meditate deeply, remaining semiconscious, for 4 hours a day. (The Common word for such meditation is "trance.") While meditating, you can dream after a fashion; such dreams are actually mental exercises that have become reflexive through years of practice. After resting in this way, you gain the same benefit that a human does from 8 hours of sleep.

If you meditate during a long rest, you finish the rest after only 4 hours. You otherwise obey all the rules for a long rest; only the duration is changed.

Raw data
{
  "srd": true,
  "name": "Trance",
  "page": 24,
  "type": "entries",
  "__prop": "raceFeature",
  "source": "PHB",
  "entries": [
    "Elves don't need to sleep. Instead, they meditate deeply, remaining semiconscious, for 4 hours a day. (The Common word for such meditation is \"trance.\") While meditating, you can dream after a fashion; such dreams are actually mental exercises that have become reflexive through years of practice. After resting in this way, you gain the same benefit that a human does from 8 hours of sleep.",
    "{@note If you meditate during a long rest, you finish the rest after only 4 hours. You otherwise obey all the rules for a long rest; only the duration is changed.}"
  ],
  "raceName": "Elf (Drow)",
  "basicRules": false,
  "raceSource": "PHB",
  "_raceBaseName": "Elf",
  "_raceBaseSource": "PHB",
  "_raceSubraceName": "Drow"
}