Strangulation

 is a Apprentice level Destruction spell. The effect of the spell is Drain Health 70pts for 3sec on Touch. The Magicka cost of the spell is 62.

Known locations
As with all Spell Tomes, spawns randomly depending on multiple factors such as the characters level and spell level. However, for the best odds of finding a Spell Tome, search boss-level chests in Necromancer and Conjurer lairs.