Welcome to the Official Redemption® Message Board!
I read it as:Negate the protect ability on an evil fortress. you may discard a silver enhancement from the game to discard an evil character in a territory, if you do so remove this character from the game after battle.It really should have been a Comma instead of a Period there. It would mak the card much clearer.EDIT: Insta-Posted by Jan.
But since cards are ruled by what they say, not what they should have been, I believe Janissary is correct, you can negate the protect on an evil fortress, with out removing The Destroyer from the game.