Lee Shin-Woo tested out Fire Shadow several times and came to the conclusion that the element suited him more than Seagald.

Fire Shadow would connect him to his subordinates, strengthen them, and protect them... Similar to Lightning Bind, it would buff those he’d formed a contract with, but in a completely different way.

"...It feels a bit unpleasant. It feels like you're right beside me at all times."

"I'm testing out the ability, so bear with it."

"This is strange. Is it a buff? It feels like some unknown power is strengthening my every move."

"My fire-using subordinates will likely experience the most extreme change."

While the Magic Emperor's Lightning Bind specialized in controlling his subordinate's power, Fire Shadow was the opposite; it used his power to strengthen his subordinates.

Lightning Bind forcefully took control of one's body at long-range, whereas Fire Shadow allowed the user to transport to their subordinate's side. They were at the opposite ends of the spectrum.

...The reason Seagald's soldiers were forced to immolate themselves to summon him was all due...