Minas Morgul, Dark Fortress

Minas Morgul, Dark Fortress enters the battlefield
tapped.

{t}: Add {b}.

{3}{b}, {t}: Put a shadow counter on target creature.
For as long as that creature has a shadow counter on
it, it's a Wraith in addition to its other types. (A
creature with shadow can block or be blocked by
only creatures with shadow.)