When the streets are silent, and the darkness surrounds you, listen closely. That faint echo you hear is the sound of one of the deadliest warriors known to man getting ready to attack. Echo Strike has the rare ability to change the ending with an extra attack that you were not expecting.

Rule:

Place face up in Round Effect. Each time a card is killed, draw 1 community card and place in Recruits. If Echo Purge is removed, move 1 neutral area card to your Allies. Only Faction card plays that kill cards are counted.