New gem: "Herald of Element"

Skill Description: Spell, Aura, Element, Aoe

At level 1: Adds 1-2 Fire Damage, Adds 1-5 Lightning Damage, Adds 1-2 Cold damage, 10% Reduced Attack/Cast Speed
At level 20: Adds 130-180 Fire Damage, Adds 1-300 Lightning Damage, Adds 120-140 Cold damage
GCP 20%: 10% Increased Attack/Cast Speed
50% of the damage is applied for attacks
25% of the damage is applied for spells
Enemies are hit with random elements when they come near the player
Mana Reserve: 40%

Support Gems: Conc effect, Increased aoe

Nodes that affect: Increased elemental damage.

Cosmetic Effect: Your character turns into random animal


XD

a heraldthat adds elemental damage is pointless since we already have that, a herald that does damage around you could be but i would make it a bit more unique like

herald of disease:
degenerates 10% of your max HP-ES per second (disables ES regen)
deals 10% plus 3% per level of your max hp and ES per second as chaos damage around you
on death enemys heal your HP and ES by a % of their max health.
like RF deactivates when lifereachs 1.