Deadly Strike are like critical hits, but unlike critical hits which deal 200% damage, Deadly hits deal 300% Damage. Every Deadly Strike will regain 1 Rage Crystal.
How to get Deadly Strike
Non damaging Deadly Strike
It is possible to get a deadly strike when using the Light healing spell,target will be healed at 300% of the base healing number; so if a +45 Heal got a deadly strike, it would heal +135 instead. It is also possible with Prayer Of Protection spell, you will get +75 off Prayer Of Protection 2 but the shield's damage absorb will not change.