The portal that Adrian conjured led them straight to the location of the Undead King. He thought that the safest location to be transported would be by the Undead King's side which is why he chose that location. Adrian actually never thought that the Undead King would already be participating in the war.
"Where did you even send us? Are we in a battlefield?" Levin Cloud stated as he ducked with Morte to dodge an incoming arrow.
"I sent us to the side of the Undead King which I thought as the safest place for Morte but clearly I judged wrong." Adrian muttered the last part to himself as he ducked to dodge a fireball.
"That would have been perfect if he was actually not participating in the war right now." Levin Cloud muttered to himself so that the Undead King would not be able to hear clearly.
"Sanctuary!" Levin Cloud casted as a golden light protected them from the incoming barrage of ranged attacks.