/usr/lib/x86_64-linux-gnu/libMagickWand-6.Q16HDRI.so is in libmagickwand-6.q16hdri-dev 8:6.9.7.4+dfsg-16ubuntu6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libMagickWand-6.Q16HDRI.so.3.0.0