MarsSeed [1] filed a deletion request for hydra-bin [2]: Broken, unmaintained, seemingly unused package (1 vote, 0 comments). Does not declare the necessary conflicts entry.
Also Arch/extra/hydra is a completely different application, therefore provides=hydra is misleading and wrong. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/hydra-bin/
