Invulnerability

Invulnerability is a status effect that renders the target completely immune to all status effects and damage, except for most damage flagged as HP Removal. Most friendly effects, such as healing and teleports, are unaffected by invulnerability.

Definition
Invulnerability itself is not granted explicitly by any ability effects, it is instead granted as a secondary effect to other abilities. Consequently, invulnerability is often only granted for very short periods of time. It also does not disjoint projectiles, unless explicitly stated.

Units affected often cannot be targeted by attacks or abilities and will often have their health bar temporarily hidden.