Yes, you heard right. Basically Tesla Coils would be blocks that when powered generate so much electricity that anything that comes in contact with them gets zapped the hell out of. Watch where you step though! EDIT: They would preferably be placed in the background. Internet cookie to Wulf!
hm, good idea for traps and home/NPC city defences. but as an all around substitute for lava? nah. EDIT: also, if you place it in the background layer, shocks stuff that walks past it? Hell yeah!
Well, I was kind of referring to Terraria with the lava part, considering how many people used it for their defense systems. And yes, having it in the background would be awesome.
It's only supposed to hurt you for a crap ton when you pass by it. You'd basically break it like pretty much any background tile.