Conversation so far:
what sort of powers did Drusilla from Buffy the Vampire Slayer have?
Drusilla has all the standard powers and vulnerabilities of a vampire, plus minor psychic abilities.
What do her abilities allow Buffy the Vampire Slayer's Drusilla to see?
Drusilla receives vivid visions that contain possible glimpses of the future, and can also see into people's minds and project false imagery into them
do Buffy the Vampire Slayer's Drusilla's powers help her hunt vampires?

Question: what are her powers used for?
Self-contained rewrite: what are Buffy the Vampire Slayer's Drusilla's powers used for?