Seeker of the Seer Storm

When Seeker of the Seer Storm unattachs from
a creature you control, investigate.
Whenever equipped creature attacks, put a
shock counter on target creature you don't
control.
Reconfigure {u} ({u}: Attach to target creature you
control; or unattach from a creature. Reconfigure only
as a sorcery. While attached, this isn't a creature.)