Gem Ideas: Vaal Heralds

Herald of Profanity:
100% Int requirements.
Reserves 25% life.
Increases the power of your Curses.
You may inflict 1 extra curse.
You may inflict 1 curse on curse immune enemies.
Enemies that you kill cast a random curse at their location on death. (As in, they curse you if you are close enough.)

Herald of Spectrality:
100% Dex requirements.
Reserves 25% life.
Grants a chance for your projectiles to pierce.
Gain a small amount of your physical damage as chaos damage for attacks and spells.
Phasing?
You take 10% increased physical damage.

Herald of Brutality:
100% Str requirements.
Reserves 25% life.
All your attacks and spells gain knockback.
Enemies that hit a wall when knocked back take extra physical damage.
Increases knockback distance.
Enemies have reduced stun threshold.
You have reduced stun threshold.
Enemy hits that stun you also inflict knockback.

Vaal herald of ice
Duration: 5 sec
Adds x-y cold dame to attacks and spells
Cour cold damage deals splash damag on hit and create chilled ground for 2 seconds.

Vaal herald of thunder
Duration: 5 sec
Adds x-y lightning damage to attacks and spells
Shocking enemies creates shocked ground for twice the shock duration
Creates a lightning storm that deals 10%-15% of overkill damage per hit when killing an enemy, lasts 1.5 seconds.

Vaal herald of ash
Duration: 5 sec
Adds 30% of physical damage as extra fire damage
Ignited enemies explode for 150% of the remaining ignite damage when killed. This effect cannot ignite.
Cover nearby enemies in ash when hit.