K'rak waved his hands in an imaginary ward, not trusting the shadow magic. "I will take the front door. I'm sssssure you can break through roof with your own magic. I'm cssssertain you can usse the higher ground, whereasss I am better on the ground."
K'rak braced his sword and shield and pushed open the door, and was met by the struggling of bodies in mortal dance. Giant dark knights carved their way through lesser warriors as they panicked. Those knights felt wrong, and K'rak could only assume they were associated with this 'Forbidden Kingdom'. K'rak could see a group of Holy Knights holding their own and a plucky Dwarf cussing his way through Dark Warriors with some form of fire stick. 
A robed figure looked at home in this setting, and called out "Well it looks like we have three tough ones. It's ok. I brought more knights." And beckoned forth more Warriors.
K'rak decided that the stealthy approach was necessary, and that the robed figure had to die. Drawing the shadows around him, he hoped the figure would be distracted enough by the fight that he wouldn't sense K'rak's spell through the hailstorm of mana flying around.