Fort Frontliner

Fort Frontliner enters the battlefield garrisoned.
While Fort Frontliner is garrisoned, other
garrisoned dwarfs you control gains reach
and indestructible.
Garrison {g} (This creature gains defender and
+1/+1. Activate this ability only if you control a
Fort and anytime you could cast a sorcery. If you
activate this ability on a already garrisoned
creature, end the effect)