South Gate

{t}: Add {1} to your mana pool. Add one mana of
any color to your mana pool instead if you
control 4 gates with different names.
{3}, {t}: Remove target attacking creature with
flying from combat, tap it and put 2 -1/-1
counters on it. Put 2 repair counters on
South Gate. Activate only if there are no repair counters on South Gate.
Whenever South Gate becomes untapped,
remove a repair counter from it.