PC How do I make a spear battery

[Revnuke]

Spear batteries seem like neat concept for my pumpkin moon but how do they work?

 

[r4v1n6]

You may want to read this. It's about dart traps, but the principle is the same.
https://forums.terraria.org/index.p...rt-trap-batteries-for-boss-mob-farming.33652/

 

[Revnuke]

Thanks man