Invulnerability Shield

Notes:
 * Standard Shield - Blue ( [[File:InvulnerabilityShield-ICON-Blue.png]] ) - 7.5 sec Active Duration
 * Vanquisher
 * Elite Shield - Red ( [[File:InvulnerabilityShield-ICON-Red.png]] ) - 12.5 sec Active Duration
 * Elite Vanquisher
 * Commander Shield - Orange ( [[File:InvulnerabilityShield-ICON-Orange.png]] ) - 12.5 sec Active Duration
 * Vanquisher Commander