Increases the effect of your Imp's Firebolt, Fire Shield, and Blood Pact spells by X%.
Improved Imp is a warlock talent that increases the effect of all Imp spells.
This talent gives you more imp for your buck.
This talent has a huge effect on the offensive power of your imp, as well as the stamina provided by Blood Pact. A bug in the game currently prevents the bonus from Improved Imp from being reflected in Blood Pact's tooltip. The spell tooltip and actual bonus are affected, however.