Ok now it seem clear for me. Thanks Steve-O for your help. Rugal, nous jouons déjà enssemble je suis venu "sneak" par ici pour confirmer ta version sur la question.

Hi there. It's a feedback from France, so pleas, excuse my fresh default or my default of english. I got a question about the card Unrelenting. It say: So, the question is: Is there to many word or not enough? do it meen "perform an attack that targets one monster(s) of the same monster group" This way, you can attack any monsters from the same group in l.o.s. or "perform a second attack that target (one of) the same monster(s)" (If your attack is able to affect various monsters as you were with the new crossbow) That way, you can re-attack only the first targeted monster.