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Block
You will still take any Stun, Freeze and other debuffs from the Blocked hit. You can't Block while Stunned or Frozen.
Some skills used by Bosses cannot be blocked. These are indicated by a red glow and audio cue during the windup of the skill.
Block is a type of damage mitigation that typically negates all hit damage. Block is primarily obtained from shields. Shields skills can also provide a guaranteed directional block, though its consecutive usage is limited by the player's stagger.
Mechanics
The character still receives Debuffs such as Stun and Freeze associated with the blocked hit despite the damage being negated.
Unblockable skills
Damage mitigated by block is not considered "prevented damage" for stats such as those found on Wandering Reliquary.[Likely due to a bug][1]
Certain monsters may use skills which cannot normally be blocked, which will flash red when used. It is possible to block these skills with the modifier Can Block Damage from all Hits, such as from The Wailing Wall and Warbringer's Turtle Charm.
Damage over time cannot be blocked as it does not hit.
Passive block
Chance to block is applied to blockable incoming hits, such as projectiles or strikes from enemies.
When the roll for block chance succeeds, the damage will be negated. The attack can be coming from any direction, unlike active block.
Base passive block is primarily obtained from shields, though they can rarely be found on other items such as Barrier Quarterstaff. Increases to block chance modify this value. Block rounds towards the nearest integer, instead of rounding down. By default, maximum block chance is capped at 75%.
Active block
When using certain shield skills such as Raise Shield or
Shield Charge, the player will gain a directional guaranteed block. This will cause all hits that can be blocked from the direction the shield is facing to be blocked, ignoring your passive chance to block.
Blocking hits through Active Block will build up a stagger meter. When the stun meter is full, the active block skill will be cancelled and the player will become stunned.
All other effects related to block still apply. If players take damage from blocked hits (e.g. from Glancing Blows), this will also apply to Active Block.