Once Iophiel had uttered the last line of the incantation, a sphere of light, the size of a fist, appeared right on top of the tip of his Holy Sword. Its lustre wasn't that radiant, only enough to brighten up a circumference of a couple of meters away from orb itself.
The sphere then slowly made its descent, following the length of the blade. When it reached the level of the sword's pommel, it permitted itself to be absorbed by the gem embedded in the metal frame. Immediately afterwards, the darkness of the night enveloped Iophiel's physique. The Duke exercised his patience as he only needed to wait for a few seconds for the spell to fully activate.