A city, a town, a forest, a burning forest, a desert: It didn't matter the terrain, all Finis members are trained to be a shadow in both the light and the dark, invisible to normal eyes, not by magic, but pure skill and training. 

Natus spotted the target threatening his team. Against an army, he is weak. Against a single man, he is a grim reaper. He had positioned him behind the grenadier, moving without a sound. He reached towards the ground and grabbed as much dirt as he could from the ground, with his blade in his other hand. As he moved, he striked the group with the red-edge of his blade, moving quickly and without hesistiance or pause. And without stopping his stride, he made two brutal slashes against the tendons of the would-be bomber, leaving them with the red mark. 

He turned around, and the red marks he left on the ground and the person exploded as he took the dirt and throw it into the crowd to cover his escape. At least one bullet flew towards him, but did not hit. He retreated back into stealth, hoping he had placed enough force into his attack to kill the man quickly. Another sneak attack against the same enemy twice would be harder, but not impossible.