# Instadeath
Instadeath stands for instant death. An instadeath causes death in zero time and allows no intervention. These effects do not count as HP damage and thus cannot be survived through self-polymorph.
Causes of instadeaths are:

Turning to stone (unless stoning resistant), which can be caused by:
Touching a cockatrice or chickatrice corpse without worn gloves
Passing a square with a cockatrice or chickatrice corpse while blind and not levitating is considered as touching the corpse.
Eating a cockatrice or chickatrice corpse, or eating the corpse of Medusa
Kicking a cockatrice or chickatrice corpse without worn boots
Trying to sacrifice or tin a cockatrice or chickatrice corpse without worn gloves, even if it is already lying on the altar
Falling into a pit, hole, or trapdoor while wielding a cockatrice or chickatrice corpse
Includes deliberately flying down a hole, although flying over a pit is safe
Falling down stairs due to being burdened while wielding a cockatrice or chickatrice corpse
Attacking a cockatrice or chickatrice while polymorphed into a creature with a contact attack, or when not wielding a weapon and not wearing gloves
Seeing Medusa's gaze, unless blind or reflecting. (Invisibility protects her, not you.)
Being hit by a thrown cockatrice egg
Being hit by a death ray while not having magic resistance, and not polymorphed into a demon or undead. This can be achieved by:
Zapping yourself with a wand of death or a finger of death — this will kill you even if you have magic resistance. ("You irradiate yourself with pure energy!")
Zapping a wand of death or finger of death, and being hit by the ray reflecting off a wall or a monster's reflection. Reflection will protect against this.
Having a monster zap you with a wand of death. Reflection can also protect against this.
Being touched by the touch of death while not having magic resistance, not polymorphed into a demon or undead, and not hallucinating.
Being fatally poisoned by a monster attack, a poisoned weapon, or a spiked pit, unless you have poison resistance. (Quaffing a potion of sickness or eating a poisonous corpse will never instakill you, but may kill you by HP loss or strength drain.)
Choking on your food
Starving to death
Drowning in a body of water
If you fall into a body of water with no adjacent land, you'll drown unless you are breathless or amphibious.
Falling into water with excessive encumbrance may drown you even if there is adjacent land. There is a chance that you drop some inventory instead.
Standing near a collapsing drawbridge
Genociding your own race by reading a scroll of genocide or sitting on a throne. Reading a non-cursed scroll of genocide while confused always results in self-genocide.
Falling into lava without fire resistance
Intentionally level teleporting yourself to level 0 or any negative-numbered level — level 0 is nowhere, −1 to −9 are "above the clouds", and −10 and above are Heaven. Teleporting to a level "above" 0 will not instakill you if you are levitating or flying, but the game will end anyway by escaping the dungeon.
Even though levels −1 to −5 do exist in the game code (they are the Elemental Planes and Astral Plane), you need the real Amulet of Yendor to enter them, and you can't levelport while carrying it.
Being hit by a disintegration breath (from a black dragon or the Chromatic Dragon) without reflection or disintegration resistance. If you are wearing a shield, it disintegrates, saving you; otherwise, if you are wearing body armor, that and any cloak disintegrate, again saving you (but likely leaving you with a very poor armor class and vulnerable to the rebound).
Being hit by a lightning bolt from an angry god without reflection or shock resistance
Being hit by a wide-angle disintegration beam from an angry god without disintegration resistance. Reflection and armor will not protect you in this case.
Being level drained below experience level 1
Eating any of the Riders' corpses (note that food appraisal does not warn you)
Digesting any of the Riders
Having your brain eaten by a mind flayer
Offering the Amulet of Yendor to Moloch on the unaligned high altar in the Sanctum
The following will instantly kill the player in most situations, but are not instadeath since they deal HP damage equal to twice the player's maximum HP instead of simply killing them. A player polymorphed into a monster will survive and return to their base form.

Being beheaded by Vorpal Blade or bisected by the Tsurugi of Muramasa (5% chance per hit)
Dying on turn one generates the message "Do not pass go. Do not collect 200 zorkmids." This is a reference to the board game Monopoly.

Contents

1 Instakilling monsters
2 Variants

2.1 SLASH'EM
2.2 dNetHack
2.3 FIQHack

3 See also

Instakilling monsters
In many situations, it is very helpful for a player to have a way to instantly kill other monsters. Here are some methods of instantly killing monsters, listed roughly in order from most common to most obscure. Not all methods work on all monsters; for example, undead monsters resist death rays.

Zap a monster with a wand of death or finger of death
Hit a monster with a poisoned weapon (10% chance)
Zap a monster with a wand, potion, or spell of polymorph (small chance of fatal system shock)
Hit a monster with a wielded or thrown cockatrice corpse or cockatrice egg
Disintegrate a monster with a black dragon's disintegration breath
Engulf a monster with a swallowing monster such as a purple worm or trapper
Open, close, or destroy a drawbridge on top of a monster
Attack a monster with Vorpal Blade or the Tsurugi of Muramasa (5% chance per hit for most monsters, Vorpal Blade is a 100% chance if the monster is a jabberwock)
Displace a pet into water or lava
Cause a monster engulfing you to be struck by a lightning bolt from an angry god
Cause a monster engulfing you to be struck by a wide-angle disintegration beam from an angry god (requires it to survive the aforementioned lightning bolt, generally by being shock resistant)
Polymorph into a sea monster with a drowning attack, and repeatedly attack monsters while being in water (breathless monsters will survive this type of attack). The chance of wrapping around a target monster is only about 10%, but if it's successful, the next melee attack will instakill the monster.
Variants
SLASH'EM
SLASH'EM features several new instadeaths. They are:

Being hit by a gaze of death from a Catoblepas or the Beholder
Asking a gypsy to read your fortune and drawing Death while not having magic resistance
Being hit by Thiefbane (10% chance)
Being hit by Serpent's Tongue without poison resistance (10% chance)
Being hit by a wooden stake as a vampire
Invoking the Eye of the Beholder with your luck less than −9.
Being hit by Houchou
dNetHack
dNetHack features the following insteadeaths:

Being on the same level as a dying mandrake, while you have 100 or fewer hit points.  Hallucination or the seal of Ose will prevent this.
FIQHack
FIQHack does not have poison instadeath. Instead, you suffer permanent attribute loss, which cannot be cured by a unicorn horn or potion.

See also
Delayed instadeath, which also results in sudden death but allows for emergency intervention.
Trickery, which ends a game instantly as an anti-cheating measure and is not considered death

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