Click on the event if it shows a lock. You will need to have completed 4 or more challenges in the harder maps and to have seen the original event first before the courage intervention variant appears.
i thought the intervention thing was the heart in combat from the client and companion getting frisky well what is the heart thing interaction in combat?
The heart just pops up at any event. It was added to help notify players that something's happening because often they'd get too focused on the strategy to notice.