Messmer's Inquisition

As you cast this spell, name a creature type. Then, destroy all creatures of the chosen type, they cannot
be regenerated.

Long before the Shattering, Messmer was charged
by his mother with carrying out a purge of the
tower-dwelling people of the Land of Shadow,
who did not bear the light of grace. At some point,
Messmer was abandoned in the Land of Shadow,
but continued to zealously enforce the purge even
though Marika ceased all contact with him.