Creasing
Creasing is a type of a custom ability. Player with this ability deals bonus true durability damage to armor and shields, which scales with the maximum durability of said item. This happens when any nonzero damage is dealt. In case the Unbreaking enchantment of the targeted item procs, Creasing deals no durability damage.
Enchantment
Creasing is also the name of a custom enchantment for bows, crossbows and melee weapons. It reduces armor and shield durability by 2% of the maximum durability per enchantment level. Creasing effects from multiple sources add up. Whenever an item is damaged by Creasing, a sound is played (the sound effect has a 0.25s cooldown).
Sources
This passive ability is given to the whole team when the Essence of Destruction is consumed. Their melee attacks have 2.5% Creasing for 8 minutes. 40 hits will destroy any armor/shield without Unbreaking. Tracker's crossbow has Creasing II, making every damaging shot deal additional durability damage equal to 4% of the maximum durability. 25 hits will destroy any armor/shield without Unbreaking.