Suppression

Suppression is a warlock talent that increases the hit chance of Spells and reduces the mana cost of Affliction Spells.

Functionality
This talent affects your spells' chance to hit (i.e. "resistance" based on level) and not your spells' spell penetration (i.e. magic resistance).

This means that two points in Suppression will completely negate most of the miss chance of your Affliction spells against targets of your level and three points will completely negate most of their miss chance against targets up to two levels above you.