Golden Aura

From Archon Arcana
Golden Aura • Sanctum • Action • Common • Play: Choose a creature. Fully heal the chosen creature. For the remainder of the turn, the chosen creature is considered to be in house Sanctum and cannot be dealt damage. • Artist: Natalie Russo • Card Number: AoA (217)

Golden Aura
Play: Choose a creature. Fully heal the chosen creature. For the remainder of the turn, the chosen creature is considered to be in house Sanctum and cannot be dealt damage.
AoA 217

Commentary

Effects may still attempt to deal damage to a creature that "cannot be dealt damage", but the targeted creature's ability will prevent that damage according to the first step of the Damage section of the Timing Chart.

Source: Timing Chart
If an ability says "Choose a creature," the Active Player may choose a Friendly or Enemy creature when resolving the effect.

Source: Rulebook