Flying Creatures and Falling
A flying creature in flight falls if it is knocked prone, if its speed is reduced to 0 feet, or if it
otherwise loses the ability to move, unless it can hover or it is being held aloft by magic, such as
the fly spell.
If you’d like a flying creature to have a better chance of surviving a fall than a non-flying
creature does, use this rule: subtract the creature’s current flying speed from the distance it fell
before calculating falling damage. This rule is helpful to a flier that is knocked prone but is still
conscious and has a current flying speed that is greater than 0 feet. The rule is designed to
simulate the creature flapping its wings furiously or taking similar measures to slow the velocity
of its fall.
If you use the rule for rate of falling in the previous section, a flying creature descends 500 feet
on the turn when it falls, just as other creatures do. But if that creature starts any of its later turns
still falling and is prone, it can halt the fall on its turn by spending half its flying speed to counter
the prone condition (as if it were standing up in midair).
Sleep
Just as in the real world, D&D characters spend many hours sleeping, most often as part of a
long rest. Most monsters also need to sleep. While a creature sleeps, it is subjected to the
unconscious condition. Here are a few rules that expand on that basic fact.
Waking Someone
A creature that is naturally sleeping, as opposed to being in a magically or chemically induced
sleep, wakes up if it takes any damage or if someone else uses an action to shake or slap the
creature awake. A sudden loud noise — such as yelling, thunder, or a ringing bell — also
awakens someone that is sleeping naturally.
Whispers don’t disturb sleep, unless a sleeper’s passive Wisdom (Perception) score is 20 or
higher and the whispers are within 10 feet of the sleeper. Speech at a normal volume awakens a
sleeper if the environment is otherwise silent (no wind, birdsong, crickets, street sounds, or the
like) and the sleeper has a passive Wisdom (Perception) score of 15 or higher.
Sleeping in Armor
Sleeping in light armor has no adverse effect on the wearer, but sleeping in medium or heavy
armor makes it difficult to recover fully during a long rest.
When you finish a long rest during which you slept in medium or heavy armor, you regain only
one quarter of your spent Hit Dice (minimum of one die). If you have any levels of exhaustion,
the rest doesn’t reduce your exhaustion level.