Improved Shadow Bolt

Improved Shadow Bolt
	Improved Shadow Bolt (5 ranks); Increases the damage done by your Shadow Bolt spell by X%, and your Shadow Bolt causes your target to be vulnerable to spell damage, increasing spell critical strike chance against that target by X%. Effect lasts 30 sec.;
Requirements
Class	Warlock
Talent required	None
Properties
Affects	[Shadow Bolt]
Related debuff
	Magic ; Shadow Mastery ; Chance to be critically hit with spells increased by X% ; Duration: 30 seconds ;

Improved Shadow Bolt is a talent in the Destruction tree, you will need to spend 5 points in Destruction to max it.

Rank table

The debuff applied to target is a magic effect called Shadow Mastery, which should not be confused with the [Shadow Mastery] talent found at tier 6 of the Affliction tree.
The Shadow Mastery debuff and the mage [Improved Scorch] debuff do not stack. The Shadow Mastery debuff takes precedence over the Improved Scorch, and will override Improved Scorch, however the opposite is not true.
As a result of the priority of Shadow Mastery over Improved Scorch, if a talented Warlock and Mage are in the same group, it is better for the warlock to cast Improved Shadow Bolt than for a mage to try to maintain the scorch debuff, as scorch is considered a DPS loss within the mage's rotation ^{[citation needed]} .

Improved Shadow Bolt
Improved Shadow Bolt (5 ranks) Increases the damage done by your Shadow Bolt spell by X%, and your Shadow Bolt causes your target to be vulnerable to spell damage, increasing spell critical strike chance against that target by X%. Effect lasts 30 sec.
Requirements
Class	Warlock
Talent required	None
Properties
Affects	[Shadow Bolt]
Related debuff
Magic Shadow Mastery Chance to be critically hit with spells increased by X% Duration: 30 seconds