Lighthouse of Discovery

Cast Lighthouse of Discovery only if you have
the city's blessing.
Man 1 (Tap any number of creatures you control
with total power 1 or more: This Building becomes operational until end of turn.)
If Lighthouse of Discovery is manned, you may
return it to your hand and remove a creature
you control from combat. If you do not, at the
beginning of your next upkeep, draw a card.