the eye of seeing is important for human but mostly useless for vampires , so the item only provide for most human , least vampires.
let 's say , in late game if human losing and unable to build , they will hide and build gold mines and farms somewhere else vampires cant reach.
so vampires will use butchers too hook your human out while vampires stuns your human permantely .
the buildings can block but not for long if he destroy it or your human got a side without building and hooked and die.
to prevent it , put eye of seeing , it simply blocks the hook , good luck hiding and .............
it also provide visions for visible and invisible units to warn you.
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