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'''Poisonous Vapours''' is a level 1 Alchemy/Air spell which causes [[smite-targeted]] poison on a non-resistant enemy within range.

[[Alchemist]]s start with this spell in their libraries.

==Useful Info==
Inflicts [[poison]] on a target. It inflicts <code>pow/25</code> (min. 1) poison "[[Poison#Monster Formula|stacks]]",<ref>{{source ref|0.31-b1|spl-damage.cc|3566}}</ref> and if the target does not currently have poison, 1 extra poison stack is inflicted. If the player is the target, this spell inflicts 2d6 poison damage instead of any stacks. Creatures with [[poison resistance]] cannot be poisoned at all by this spell.

Higher poison stacks mean more damage per turn, according to the following table:

{| class="wikitable" style="text-align: center;"
|+ Average poison damage per 1.0 turn
|-
!rowspan=2 | # Stacks !! colspan=2 | Damage !! rowspan=2 | Description
|-
!width="50pt" | Normal !! width="50pt" | rPois-
|-
|1 || 0.75 || 1.75 || Poisoned
|-
|2 || 1 || 3 || Very poisoned
|-
|3 || 1.25 || 4.25 || Very poisoned
|-
|4 || 2.5 || 6.5 || Extremely poisoned
|}

For more info on poison, see the [[Poison]] article.

==Strategy==
Poisonous Vapours never misses and ignores AC, making it one of the stronger early game spells. The downside is that it relies on poison - damage is done over time, and cannot damage foes with poison resistance. If the enemy isn't in melee range yet, you can walk backwards so that the enemy takes poison damage while it chases you.

===Tips & Tricks===
*[[Ignite Poison]] is quite strong with any source of poison, including this spell. It converts poison stacks into instant damage, with a great increase in damage. The Ignite Poison + Poisonous Vapours combo offers decent damage, high reliability, and good MP efficiency for its level.
*In Tiles, you can count poison stacks by the number of green poison drops on the monster. 1 drop is 1 stack (poisoned), 2 drops is 2-3 stacks (very poisoned), and 3 drops is 4 stacks (extremely poisoned).

==History==
*Prior to [[0.33]], this spell was known as '''Mercury Vapours''': it was level 2 and could [[weak]]en enemies in a 3x3 area. [[Mercury Arrow]] was introduced in 0.33 as a replacement.
*Prior to [[0.31]], this spell was called Poisonous Vapours. It was a [[Poison Magic]]/[[Air]] spell, had full [[LOS]] range, but did not have a chance to weaken foes. Also, it inflicted <code>power/15</code> stacks of poison, but with no bonus against non-poisoned foes.
*Prior to [[0.27]], Poisonous Vapours would create a short lived [[cloud]] instead of inflicting poison directly. Thus it wouldn't work if there was a cloud already there (including from the spell itself). Also, [[Vehumet]] did not consider this spell "destructive".
*Poisonous Vapours was added in [[0.20]].

==References==
<references />

Poisonous Vapours - Revision history

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