I like the design of the Dagger in the Daggerheart logo, and I have interpreted it into my take as an actual 3D Dagger. I have it as a fun prop for a playtest I'm going to run.
If you want to print your own or mix it into your own designs, I have put the file up on Printables and Makerworld. If you print them at 1/3 scale (100mm / 4") they make neat Fear Tokens for the GM. Who doesn't love a pile of daggers?
Nerdy details: It was engineered in Fusion 360 and can be printed in parts that will fit together. I used the vector graphics from the playtest logo as a starting point for the shape. However, those don't work well in CAD usually, so every profile was drawn fresh. I left some thickness on elements of the blade edge to make it easier for 3d printing. For the renderings, I went with a fear die made of ruby, a cherry wood hilt, a brass cross guard, and a steel blade. For the printable one, it's all plastic. The file has a few ways to print so whatever your printer you should be able to find a good option. If you plan to print it much larger, I recommend putting a hole down the middle and adding a dowel.
Daggerheart is owned by Critical Role / Darrington Press Team