Cast on Block
While active, gains Energy when you Block and triggers socketed Spells on reaching maximum Energy.
Very solid choice with strong damage or utility for most builds.
Gem Effects
Gains 25 Energy when you Block
(0-57)% increased Energy gained
Triggers all Socketed Spells and loses all Energy on reaching maximum Energy
Has 10 maximum Energy per 0.1 seconds of base cast time of Socketed Spells
Requirements
Best Support Gems for Cast on Block
Ranked by synergy — the game won't tell you which combo deals the most damage
How to Use Cast on Block Effectively
Practical tips you won't find on the tooltip
Trigger Conditions
Activates automatically when conditions are met. Focus on reliably meeting the trigger requirement.
Attribute Planning
Requires 86 Int at max level. Plan your passive tree and gear to meet this — don't get stuck unable to level your main skill.
Alternatives to Cast on Block
Similar skills — which one fits your build better?
While active, gains Energy when your Energy Shield is damaged by Enemy Hits. Usi
While active, gains Energy when one of your Charms is used and triggers socketed
While active, gains Energy when you Critically Hit enemies and triggers socketed
While active, gains Energy when you dodge roll and triggers socketed spells on r
How to Get Cast on Block
Use an Uncut Skill Gem to obtain Cast on Block. These drop from enemies or can be purchased from the gem vendor once unlocked through the campaign.