The fire appeared not on any staff or weapon. It directly appeared right over the hands of Emeros.
The Fire kept burning and burning, and the hands of Emeros didn't even show any signs of fire.
His fire rose above the sky and alarmed many who rushed to see the commotion.
Direct magic summoning on the hands or any body parts was dangerous for the mage users on this planet. They would have to suffer from the effects of the spell itself. This is why Fire was the most common pursuit of the mages and ice.
They were the most accessible magic types to contain within the body. Once elemental cores or any other magical replacements, they used to be grafted and release the elemental magic.
Most used staffs, wands, energy conversion circles, or enchanted weapons to harness the magic. But even with an external weapon to direct most of the magic, the spark or start of any magic had to begin inside the body where their mana was.