The Star Heart is a Lesser Artifact, which can be created at an Enchanter, using an Arcane Formula (requires expansion Immortal Throne).

Star Heart
Lesser artifact starheart
Star Heart
Vital statistics
Type Lesser Artifact
Effects +4% Elemental Damage

40 Burn Damage over 3.0 Seconds

+4% Elemental Resistance

+4% Total Speed

Reqired Reagents
Completion Bonus 1-4 Piercing Damage
Gold Cost 75 000
Required Level 10