Piercing is a Minecraft enchantment that allows an arrow fired from a crossbow to pierce multiple entities.
Using the Piercing enchantment in Minecraft
Arrows fired from a crossbow enchanted with Piercing can pass through a number of entities equal to the level of the enchantment (for a total of level + 1 damaged entities). Fired arrows can always be recovered after piercing a creature, allowing for infinite use of all types of arrows, including spectral arrows and spiked arrows. Piercing ignores shields, even if they block.
Piercing has no effect on fireworks fired from a crossbow.
Incompatibilities of enchantment piercing
In Minecraft, the Piercing enchantment cannot be combined with the following enchantment: Multishot.