
In the world of Dungeons & Dragons, the spell 'Sleep' sends creatures into a magical slumber. Players have questioned whether this spell works on the undead. According to the game mechanics, undead creatures and those immune to being charmed are not affected by the spell. However, there is some ambiguity regarding characters with the 'Undead Pact' warlock feature, which does not explicitly mention sleep, only stating that the character does not need to eat, drink, or breathe. This has led to differing interpretations, with some assuming that sleep is not required, while others argue that if sleep was not needed, it would be stated explicitly.
| Characteristics | Values |
|---|---|
| Does sleep work on undead? | No, undead and creatures immune to being charmed aren't affected by the sleep spell. |
| What is the sleep spell? | This spell sends creatures into a magical slumber. |
| How does the spell work? | Roll 5d8, the total is how many hit points of creatures this spell can affect. Creatures within 20 feet of a point you choose within range are affected in ascending order of their current hit points (ignoring unconscious creatures). |
| Does a warlock: the undead need to sleep? | No, the writeups for the warlock with the undead pact have "Grave Touched", but that only disables the need for eating, drinking and breathing - not the need for sleep. |
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What You'll Learn

Sleep spell mechanics
The Sleep spell is a powerful enchantment in the 5th edition of Dungeons and Dragons. It is an area-of-effect spell that can put creatures into a deep, magical slumber within a range of 90 feet. The spell affects creatures of any size, from tiny beasts to giant dragons.
When cast, it will cause all affected creatures to become incapacitated until they make a successful Constitution saving throw or until the duration of the spell ends. Sleep works by targeting one or more creatures within 90 feet of the caster. All targeted creatures must make a Wisdom saving throw; those who fail are immediately put to sleep for up to one minute (up to a maximum of 10 rounds). While asleep, all affected creatures remain unconscious until they take damage or someone uses an action to wake them up.
To cast the spell, players roll 5d8 to determine the total HP of creatures that can be affected, starting from the lowest hit points. Creatures within 20 feet of a point chosen by the caster within range are affected in ascending order of their current hit points (ignoring unconscious creatures).
Undead creatures and creatures immune to being charmed are not affected by this spell.
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Do Warlocks: The Undead need to sleep?
In the game Dungeons & Dragons, the sleep spell does not affect undead creatures. However, this does not necessarily mean that all undead creatures do not need to sleep.
In the case of Warlocks: The Undead, sources suggest that they do need to sleep. While the Grave Touched feature of the Undead pact Warlock states that they "don't need to eat, drink, or breathe", it does not mention anything about sleeping. Some interpret this to mean that Warlocks: The Undead do need to sleep. Additionally, the writeups for the Elven, Reborn, and Warforged races explicitly state that they do not need to sleep, which implies that other races, including Warlocks: The Undead, do need to sleep.
However, there are ways for Warlocks: The Undead to avoid sleeping. If they get the ""Pact of the Tome" feature from level 3, they can acquire the Eldritch Invocation "Aspect of the Moon", which removes the need for sleep. This invocation is also available to Elven Warlocks, who can choose to trance or stay awake during the duration of the spell. Without this invocation, Warlocks: The Undead would still need to sleep to gain the benefits of a long rest, such as healing and regaining used hit dice. While they may be able to get away with taking short rests instead of long ones, they may eventually need to take a long rest to fully recharge.
Therefore, while Warlocks: The Undead may not inherently need to sleep, they can achieve the benefits of sleep through other means, such as acquiring the "Aspect of the Moon" invocation.
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Undead immunity to unconsciousness
In the world of Dungeons & Dragons, the sleep spell does not work on the undead. The Monster Manual Glossary notes that "most undead have resistance to necrotic damage, are immune to poison, and are vulnerable to radiant damage. Undead do not need to breathe or sleep".
While the sleep spell can be used to send creatures into a magical slumber, it does not affect the undead. This is because undead creatures are not affected by the same things that affect living creatures. They do not need to breathe, eat, or sleep, and they do not have a nervous system or muscles to move.
However, it is important to note that not all undead creatures are the same. Some may have specific immunities or vulnerabilities that set them apart from other undead creatures. For example, the Skeleton stat blocks show immunity to disease and poison, while being vulnerable to radiant damage. Therefore, while the sleep spell may not work on most undead, there may be exceptions depending on the specific characteristics of the creature in question.
Additionally, there are other ways to render a creature unconscious besides the sleep spell. For example, the Rogue with the "Knockout" power or the Wizard with the Sleep spell can be used to knock out an undead creature. Alternatively, certain character abilities, such as the Zealot Barbarian's "Rage Beyond Death," can provide temporary immunity to being knocked unconscious.
In conclusion, while the undead are generally immune to the effects of unconsciousness due to their unique characteristics, there may be exceptions depending on the specific creature and the methods used to induce unconsciousness.
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Sleep spell vs. Color Spray spell
When it comes to choosing between the Sleep spell and the Color Spray spell, there are several factors to consider. Both spells are considered \"save-or-lose\" spells, meaning they can be very effective against low-CR enemies that typically have weak Will saves. However, the choice between the two spells can be tricky due to their unique advantages and disadvantages.
One key difference is their casting range and area of effect. Sleep has a longer casting range, allowing you to cast it from a safer distance of 100 ft. + 10 ft./level, while Color Spray has a shorter range of 15 ft. in a cone-shaped area. Sleep can affect creatures within a 10 ft. radius, covering 12 squares, whereas Color Spray covers 6-7 squares. Sleep is better suited for targeting spread-out enemies, while Color Spray is more effective in close-quarters encounters.
Another distinction is their casting time. Color Spray has a faster casting time, requiring only one standard action, whereas Sleep takes one round to cast. This means that enemies may realize what you are casting with Sleep and react accordingly, potentially disrupting your spellcasting. Color Spray's quicker casting time can be advantageous in catching enemies off guard.
Additionally, the effectiveness of the spells may vary depending on the level of your enemies. Sleep tends to lose its potency at higher levels, as enemies will have higher hit points, rendering the spell less effective. On the other hand, Color Spray can retain some of its usefulness at higher levels, especially against enemies with 5+ HD. Spending a 1st-level spell slot to stun an enemy for one round can be valuable.
It's worth noting that certain creatures may be immune to one or both spells. For example, elves and half-elves are immune to Sleep but not Color Spray. Additionally, undead creatures are generally immune to Sleep due to their lack of conventional consciousness. However, there is some debate about whether Color Spray affects undead. Some sources suggest that the same lack of conventional consciousness that makes undead immune to Sleep also makes them immune to Color Spray. Others argue that Color Spray affects all undead mentioned in the Monster Manual (1977) and subsequent volumes, such as skeletons, ghouls, vampires, and more. Ultimately, the decision is up to the Dungeon Master (DM) and may depend on the specific undead creature in question.
In summary, both Sleep and Color Spray spells have their strengths and weaknesses. Sleep offers a longer casting range and can affect more spread-out enemies, but it may be less effective at higher levels. Color Spray, on the other hand, has a faster casting time and can be more useful against higher-level enemies, but it has a shorter range and may not work on certain creatures, including some types of undead. The choice between the two spells ultimately depends on the specific circumstances and the types of enemies you anticipate encountering.
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Sleep spell hit points
The Sleep spell in D&D 5th Edition works by sending creatures into a magical slumber. It affects creatures within 20 feet of a chosen point within range, in ascending order of their current hit points. The spell does not affect unconscious creatures.
To cast the spell, the caster rolls 5d8, and the total is the number of hit points of creatures that can be affected by the spell. Starting with the creature with the lowest current hit points, each affected creature falls unconscious until the spell ends, the sleeper takes damage, or another character uses an action to wake them up. The caster must subtract each creature's hit points from the total before moving on to the creature with the next lowest hit points. A creature's hit points must be equal to or less than the remaining total for that creature to be affected.
Undead creatures and creatures that are immune to being charmed are not affected by the Sleep spell.
The Sleep spell can be cast using a spell slot of 2nd level or higher, in which case the caster rolls an additional 2d8 for each slot level above 1st. This can be used to increase the area of effect or the duration of the spell. For example, with a 2nd-level slot, the duration increases to 10 minutes, while with a 7th-level slot, the duration increases to 1 month.
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Frequently asked questions
No, the Sleep Spell does not work on the Undead. Undead and creatures immune to being charmed are not affected by this spell.
The writeups for the Elven, Reborn and Warforged races explicitly say that they do not need to sleep. The pact with an Undead creature does not make you Undead. The Grave Touched feature states that Warlocks: The Undead do not need to eat, drink or breathe, but it does not say anything about sleeping. Therefore, it can be assumed that they do need to sleep.
No, not all Undead need to sleep. For example, the Elven, Reborn and Warforged races do not need to sleep.
The Sleep Spell sends creatures into a magical slumber. The spell affects creatures within 20 feet of a chosen point within range. The spell affects creatures in ascending order of their current hit points, ignoring unconscious creatures.










































