How to Trigger a Blood Moon in Terraria
Triggering a Blood Moon in Terraria isn't something you can do through an in-game mechanic or item since it happens randomly each night. There's a 1 in 9 chance after you've defeated at least one boss other than King Slime. If you're eager to experience one, your best bet is to keep playing through the nights and stay prepared for when it does happen!
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You can't directly trigger a Blood Moon; it's all up to the whims of Terraria's RNG gods. Just pray to RNGesus before you sleep each in-game night.
Pro tip: Blood Moons are more annoying than useful. Why rush it? They'll happen often enough once you really get into the game.
Honestly, just build cool stuff and fight bosses. Blood Moons will come when they want to. It's like waiting for a bus, the more you look for it, the longer it seems to take. Just enjoy the game, and before you know it, a Blood Moon will crash your party.
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