Hello! what is exactly that you find difficult to replicate?
If it is perspective rotations, perhaps understanding how these windmill blades were animated may help you see how you could animate the sword:
Windmill example: Windmill Blades
A sword can also be rotated along a different axis, as shown in this little example tip:
Spine Tips: 56 sword
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If interested, this is another example with real time explanation and rigging:
https://www.youtube.com/watch?v=-ltb9IeO3iE&list=PLwGl7Ikd_6GTpd2PnWqqIZVsqotxtrtaE&t=709s
Overall, don't be afraid to use the scale and shear tools in animations to achieve the right angle. A tip that I know many good animators follow in such cases is to sketch the pose how you imagine it, and then try to recreate that key pose by "breaking" your rig in the animation and scaling or translating bones to achieve that pose properly.
I hope this helps!
