I see what you're going for, but it'd be tricky to word. As written you get what it means, but it doesn't actually work.
Perhaps:
"Set your Luke or John Hero aside for three turns. Each upkeep, negate Protect abilities on one opponent's Evil Characters and Evil Fortresses for one round. He may draw a card instead."
Slightly different to account for Multiplayer, but basically what you meant, right?
