This is going to be Henri's mark, placed on his left shoulder. http://33.media.tumblr.com/b3b2ecd99a8483c5832e7d69dceb490a/tumblr_n4kc0sx1Jq1r0629po1_500.png When he's using his power, the colors will glow a light purple and slowly swirl around the center, which will pulse and glow a much brighter r...