Blood is Power

Blood is Power is a  passive skill, unlocked at level 68.

In-game
This skill has no effect on future cooldowns; instead, remaining (ongoing) ones will be reduced by the time in percentage of their original duration, a minimum reduction of 1 second.

Once triggered, remaining cooldowns will be reduced, but until that skill is used, no further reductions will happen to it (but will happen to others).

There is no time limit between Life losses to add up.

The 100% of Life can be lost from any source: in addition to hits from enemies, traps etc., the Necromancer's own Life-consuming Blood skills will contribute to the cooldown reduction (unless their Life cost is removed by Blood for Blood).

The following spells can reduce the Necromancer's Life to assist with this skill:
 * Blood Nova, Blood Spear, Life Support
 * Thy Flesh Sustained, Possession, Blood Rush (except Hemostasis rune), Simulacrum
 * Dead Storm
 * Early Grave
 * Final Embrace, Blood Lance, Oblation

Development
Originally this skill was making every 5% Life lost by the Necromancer reduce all remaining cooldowns by 1%.