Mercury Vapours

Version 0.21: This article may not be up to date for the latest stable release of Crawl.

Poisonous Vapours
Level	2
School1	Poison
School2	Air
Source(s)	Young Poisoner's Handbook Book of Clouds
Casting noise	2
Spell noise	0

Poisonous Vapours is a level 2 Poison/Air spell which attempts to place a poison cloud on an enemy in line of sight, and is therefore smite-targeted. At low spell power, the cloud itself may not be visible, but the poison will nevertheless be stacked on the enemy.

Poisonous Vapours will fail to cast if:

• There is a non-poison cloud on the creature (this includes Mephitic Cloud), or
• The creature has poison resistance. This includes through rings and armour which the player has not yet identified, so poisonous vapours can be used to identify an item as having rPois on it.

Strategy

Poisonous Vapours is an excellent spell for Venom Mages to pick up at XL 2, as a much more reliable, more damaging Sting. The fact that it is level 2 and can't miss also makes it appealing for any character with a few free spell levels.

History

Poisonous Vapours was added in 0.20.