There are 3 damage types (Physical, Magical, and Shadow) in game with several subtypes (blunt, slashing, piercing, fire, ice, wind, earth, lightning and water). Hallowed Ground gives 100% resistance to Physical and Magical damage and will negate any effects triggered by taking damage. Shadow damage is used mainly for boss limit breaks and enrage attacks.

Hallowed Ground has an animation lock of roughly 1 second and applies the buff at the end of the action. Due to how latency between client and server works, the server could end up sending a damage packet that kills you before after you use Hallowed Ground but before the Server gets your buff packet.