Drumstick

The Merchant sells both halves, but only once a boss has fallen. Any of Skeletron, the Wall of Flesh, the Brain of Cthulhu or the Eater of Worlds opens the stock, whichever you reach first. You need both halves. Put the Drum Set down, stand directly on top of it, and hold the Drumstick. Standing next to it does nothing, which is the usual reason someone decides theirs is broken.

There is one button, so the kit reads your mouse instead. How far the cursor sits from your character decides which drum fires, in bands running outward from the kick right beside you, through the toms and the snare, to the hi hats and finally the cymbals at the far edge. Playing a fill means sweeping the pointer outward rather than aiming at anything. Those bands are measured against the screen, so your zoom level decides how far the mouse has to travel between a kick and a crash.

The drumstick keeps swinging when you hold the button, but the sound does not repeat, so you cannot roll by holding the mouse down. Every note is a separate click. That caps how fast one player can go, and it is why drum lines in multiplayer builds usually get split between two people on two kits.

The drumstick nods at Dave Grohl, whose coffee habit once landed him in a hospital. The kit's own line is written as the rimshot sting you hear after somebody tells a bad joke.