Poison

Poison is your basic DOT debilitation. To the Arisen, Pawns, and all Monsters, it will do around 20 HP per second. The Assassin augmentation Toxicity can multiply the effects of Poison, (though it isn't known for sure if it applies to all things poison related or to just the poison attacks done by the Assassin vocation.)

Curatives such as Interventive and Detoxicating Powder will get rid of this bothersome debilitation. Spells such as Halidom can also cure poison.

For the use of arrows, it's a very good tool to use when fighting larger monsters early on in the game, as Poison adds a "extra man" to the team.