Piercing

Piercing is an enchantment applied to crossbows that allows fired arrows to damage and fly through multiple entities, including shields, without being consumed.

Piercing can be obtained from enchanting tables, drops from mobs that have spawned in a raid,‌[Bedrock Edition only] books obtained by fishing, monster room chests, librarian villagers, and non-village structure loot.

Arrows shot from a Piercing crossbow can pass through the number of entities equal to the enchantment level (for a total of level + 1 entities damaged). The shot arrows can still be retrieved after piercing a mob, allowing for infinite use of all arrow types, including spectral arrows and tipped arrows. Arrows do not change direction upon piercing a mob, meaning they hit only mobs in the line of flight.