-Craftable statues made from banners and stone that spawn their respective creature.
-Laser tripwires that sense anything that passes by them (can be used for large pits where enemies fall in and activate traps instead of timers constantly going off [bought from cyborg]).
-Blocks that can fire projectiles at enemies when powered to go with the laser tripwire (could be crafted from arcane rune walls, crystal blocks, and any type of ammunition, although Rocket !! and IV might be a bad idea for this one[will fire where it is facing if no enemies are in sight).
-A remote switch that can be used from your inventory (seeing as everyone wants remote wiring, and it could be crafted from a teleporter, metal depending on when this item is available {early or endgame}, wires, and a wrench to respond to different receivers [red to red, blue to blue, etc.])
-A pedestal that powers on when a sword is placed in it, perhaps if the wrong sword is entered it could set off a different color of wire (crafted with stone, a pressure plate, and wire).
-A block that powers on when liquid passes over it (crafted from a pressure plate, wire, stone, and a magic dropper).
-Blocks that give buffs and debuffs when stood on and powered [crafted from stone, wire, and an accessory with a debuff resistance (blindfold, alarm clock, almost any component of the ahnk charm or potion with certain affects {obsidian skin, inferno, etc.}) I would love to use an obsidian skin block to walk through lava corridors of a base where mobs could never enter.
-A machine (crafted from a teleporter, a flesh cloning vat, wires, nanites, and a gun or sword (not sure which specifically) that could create androids {3 at a time limit} to fight for you. Like a minion summoner, but stationary. I would place these in my base that is not full of lava as a home security system.