I will show you how to get The Horseman's Blade in Terraria. The Horseman's Blade is Hardmode, post-Plantera sword that can be obtained by defeating the Pumpking. The Pumpking is a unique mini-boss featured in the Pumpkin Moon event. Event is only accessible after progressing to the post-Plantera stage in the game, meaning you must have already defeated Plantera to trigger this event. To start the Pumpkin Moon event, you'll need to use a Pumpkin Moon Medallion, craft recipe on your screen. Once you've triggered the event, your goal is to reach at least wave 7 or further. This is when the Pumpking will spawn. The Horseman's Blade has a drop chance approximately 1 to 12%, so you may need to engage in multiple Pumpkin Moon events to secure this powerful sword.