As Ji-Hoon charged towards the spider horde, he mused inwardly, "Guardian, you said I can cast spells within my domain, right?"
Guardian's voice echoed in his head, "{Affirmative.}"
In that second before his blade came into contact with the body of the giant metallic spider, a bright red magic circle appeared on the katana. As soon as it did, the blade was suddenly engulfed in flames.
Ji-Hoon spun around, unleashing a powerful swing of his katana. The metallic spider succumbed to the burning edge of the blade, cleaved in half. The flames intensified upon impact, engulfing the creature's split body.
In the blink of an eye, Ji-Hoon plunged his hand into the still-burning metallic spider's flesh, swiftly retrieving its core and stashing it away in his inventory. His movements were seamless, a well-practiced routine in the midst of battle.