Lightbringer

Functions as a +1 versatile, slashing weapon that
must be attuned (1d8 or 1d10).
{t}Glows as bright as a torch upon wielder's
command.
{t}While glowing, deals +1d6 radiant damage
to undead.
"Lightbringer, Sword of the Morning, forged for a
cleric of Pelor, to cleanse the undead stain of Vecna
from this world."
—boring hymnal