Martyrdom
Client records describe this reading. They do not confirm availability in gameplay.
Current client record
Gives you a 0% chance to gain Focused Casting for 6 sec after being the victim of a melee or ranged critical strike. The Focused Casting effect prevents you from losing casting time when taking damage and increases your resistance to Interrupt effects by 20%.
Sourced change history
No changes in the tracked log could be matched to this record. This does not mean the ability or item has never changed.