Official Rulings
I use my Hallowed Shield (AoA 218) to protect my Maruck the Marked (AoA 220) from damage and then I attack my opponent’s 3-power creature. Do I capture an Æember with Maruck’s ability?
No. Protection effects like Hallowed Shield prevent damage before armor. Maruck still has 1 armor left after the fight.
Source: Rulebook
I use my Hallowed Shield (AoA 218) to protect my Maruck the Marked (AoA 220) from damage and then I attack my opponent’s 3-power creature. Do I capture an Æember with Maruck’s ability?
No. Protection effects like Hallowed Shield prevent damage before armor. Maruck still has 1 armor left after the fight.
Source: Rulebook
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
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