Killer Ballistae (キラーアーチ Kirā āchi, lit. Killer Arches in the Japanese versions) is a Ballista that recurrently appears across the Fire Emblem Series. Befitting the standard Ballista features of being long-ranged artillery weapons that can only be operated by units belonging to the Archer class line and which cannot be countered, the Killer Ballista is outfitted with a unique attribute of its own: An upped Critical hit percentage, essentially increasing its operator's ability to severely wound selected enemy targets. This fact alone makes the Killer Ballista the long-ranged counterpart of the Killer Bow.