I have found a musket but I don't really know what it can drop, I'm curious, thanks for the feed-back

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1 Answer

From a very quick search, you can obtain a Musket and 100 Musket Balls, a Shadow Orb, a Vilethorn, a Ball O' Hurt, or a Band of Starpower, all with the same chance.

The very first Shadow Orb broken in a world will always drop a Musket and Musket Balls.