PoE2 skill gem

Cast on Block

While active, gains Energy when you Block and triggers socketed Spells on reaching maximum Energy.

Current series

Changed in 0.5

0.5.0
Direct change

The Svalinn Unique Shield's Cast on Block Skill now has Supported Skills Cost nothing. It also now has +50-100 Runic Ward, existing items are not affected by this change.

Full patch history

Effects

9 effects

Cast on Block

Support

  • Supported Skills Cost nothing
  • Has 10 maximum Energy per 0.1 seconds of base cast time of Socketed Spells

Requirements and restrictions

1 requirement groups
Player requirementsLevel (1-90)
Source requirement text

Requires: Level (1-90)

Gem level progression

40 levels
Cast on Block levels 1 to 20
LevelRequires LevelBase Damage{0}% increased Energy gained
10100%, 100%, 100%, 100%Not applicable
23100%, 100%, 100%, 100%3
36100%, 100%, 100%, 100%6
410100%, 100%, 100%, 100%9
514100%, 100%, 100%, 100%12
618100%, 100%, 100%, 100%15
722100%, 100%, 100%, 100%18
826100%, 100%, 100%, 100%21
931100%, 100%, 100%, 100%24
1036100%, 100%, 100%, 100%27
1141100%, 100%, 100%, 100%30
1246100%, 100%, 100%, 100%33
1352100%, 100%, 100%, 100%36
1458100%, 100%, 100%, 100%39
1564100%, 100%, 100%, 100%42
1666100%, 100%, 100%, 100%45
1772100%, 100%, 100%, 100%48
1878100%, 100%, 100%, 100%51
1984100%, 100%, 100%, 100%54
2090100%, 100%, 100%, 100%57
Beyond level 20, 20 levels
Cast on Block levels beyond 20
LevelRequires LevelBase Damage{0}% increased Energy gained
21Not applicable100%, 100%, 100%, 100%60
22Not applicable100%, 100%, 100%, 100%63
23Not applicable100%, 100%, 100%, 100%66
24Not applicable100%, 100%, 100%, 100%69
25Not applicable100%, 100%, 100%, 100%72
26Not applicable100%, 100%, 100%, 100%75
27Not applicable100%, 100%, 100%, 100%78
28Not applicable100%, 100%, 100%, 100%81
29Not applicable100%, 100%, 100%, 100%84
30Not applicable100%, 100%, 100%, 100%87
31Not applicable100%, 100%, 100%, 100%90
32Not applicable100%, 100%, 100%, 100%93
33Not applicable100%, 100%, 100%, 100%96
34Not applicable100%, 100%, 100%, 100%99
35Not applicable100%, 100%, 100%, 100%102
36Not applicable100%, 100%, 100%, 100%105
37Not applicable100%, 100%, 100%, 100%108
38Not applicable100%, 100%, 100%, 100%111
39Not applicable100%, 100%, 100%, 100%114
40Not applicable100%, 100%, 100%, 100%117

Quality effects

1 effects

Compatible support gems

34 source records
Show 10 more compatible gems
Compatibility rules

Active Type: HasReservation, OngoingSkill, Meta, Persistent, Buff, CanHaveMultipleOngoingSkillInstances, GeneratesEnergy, Triggers, AttackInPlace

Granted by items

1 items

Acquisition

1 sources

Vaal Orb outcomes

4 outcomes / 0 enchantments

Vaal Orb can corrupt Cast on Block. One applicable outcome is selected, and the item normally cannot be modified again by ordinary crafting.

01
No change.
02
Permanently add or subtract one gem level. This is retained when upgrading the gem level using an uncut gem. Max level gems can exceed their normal maximum this way, but cannot go below Level 1.
03
Add or remove a socket.
04
±10% to Quality, up to 23%.
View every corruption outcome and enchantment

Patch history

2 changes
0.5.0
Direct change

The Svalinn Unique Shield's Cast on Block Skill now has Supported Skills Cost nothing. It also now has +50-100 Runic Ward, existing items are not affected by this change.

0.2.0
Direct change

Fixed a bug where the Cast on Block Skill granted by the Svalinn Unique Shield was granting the wrong amount of energy. It now grants 25 base energy on block (previously displayed 250 but actually granting 2.5).