Taken from skyrim.uesp page:
"He wears a set of
hooded monk robes along with a pair of
boots. He carries the
key to the Hall of the Dead along with a selection of
common loot and gold. In combat, he relies on an
iron dagger or a
staff of frostbite. Being a priest he knows a decent set of spells. From the school of
Alteration, he knows
Oakflesh and
Stoneflesh. From the school of
Destruction, he knows
Lightning Bolt and
Sparks. From the school of
Restoration, he knows
Healing,
Grand Healing,
Lesser Ward,
Turn Undead,
Fast Healing, and
Turn Lesser Undead."
Notes:
"While on the quest
The Taste of Death, and having asked him to accompany you to
Reachcliff Cave, Brother Verulus will follow you everywhere until he is brought to
Eola. Thus, he may be used as a
powerful follower in
addition to any follower you may already have if you postpone returning to Reachcliff Cave."
Looks like you were right, Harkin
I should try it out sometime.