The Marine's Symbol is a passive item found in Momodora III.
Equipping this item will change your paper seal charge move to a fireball. The fireball is a little bigger, passes through enemies and has no maximum range, therefore flying until it leaves the screen.
Marine's Symbol is a very useful item, allowing the player to fight most things from a safe distance.
Charging the attack completely will also shoot three fireballs, allowing you to defeat some enemies that are normally out of range, since the upper fireball flies in an angle.
Marine's Symbol can be combined with Edea's Statuette to fill the entire screen with poison clouds.
Hadouken!