"Field of Ruin!" Marigold said, activating the magic circle.
All the arrows began glowing, and Romero was inflicted with Heavy Weakness, causing him to drop his weapons and fall to his knees.
"You're powerless, now," Marigold said.
Romero weakly replied, "Very...clever. Creating a magic circle with your arrows."
Before the fight, Marigold had imbued all of her arrows with mana.
Once the trap had been created, the mana from the shafts then connected to each other, forming the circle. More arrows would have strengthened the spell, but fourteen was sufficient.
Most spells in Serial Slain could be separated into two categories: Instantaneous and Ritual.
Instantaneous spells were self-explanatory; they didn't need any materials or extra steps other than the caster's own mana and an incantation.
