Statues are wireable decorations found across the world — hook one to a trigger and each pulse spawns its enemy, drops its item, or fires its effect. Enemy and critter statues feed farms, while the rest are pure building material.
Wire a statue to a trigger — a lever, timer or pressure plate. Each pulse spawns the statue's enemy, drops its item, or fires its effect, though most enemy statues limit or strip drops to curb farming.
Statues like the Slime, Bat, Heart and Star statues keep dropping useful items or spawns when pulsed on a timer. Enemy statues such as the Skeleton and Zombie spawn mobs that drop no coins or items when statue-spawned.