How do you get Arbalistic in Minecraft?

Enchant a crossbow with Piercing IV so the arrow passes through up to five mobs.

What kind of advancement is Arbalistic?

Arbalistic is a Adventure tab advancement in Java Edition, of challenge type, rewarding 85XP experience. It is hidden until you earn it.

Arbalistic

Tab: AdventureChallengeReward: 85XPHiddenDifficulty: Extreme

Quick answer: Kill five unique mobs with one crossbow shot

Hidden advancement: it only appears in the tab after you earn it.

Tree path: Adventure › Ol' Betsy › Arbalistic (advancements are independent: they can be completed in any order; the tree only guides progression)

Tree parent: Ol' Betsy

Advancements are exclusive to Java Edition. The Bedrock Edition equivalent is achievements, which have different objectives.

How to get Arbalistic

Enchant a crossbow with Piercing IV so the arrow passes through up to five mobs.
Build a tight pen and gather five different mob types in it. Leads, boats and name tags keep them in place; armor stands and mannequins also count as targets.
Weaken every mob to one hit: punch or use a weak sword until each would die to a single arrow.
Fire one arrow through all five so each dies to that same shot. The challenge is hidden and pays 85 XP.

Tips

An easy lineup: chicken, sheep, pig, cow and one zombie in a 1-wide corridor. Fire at eye height of the tallest mob so the arrow travels through the whole row. It is a hidden advancement, so it only appears in the menu after you complete it.

More guides from this tab (Adventure): Adventure Heart Transplanter Voluntary Exile Country Lode, Take Me Home Is It a Bird?Monster Hunter