Usurping an Emperor

Pebbles has asked me to bring a party into the Deathfist Citadel to slay the emperor and the two princes.
==Steps==
#Kill the Emperor and the two princes.
#*Find and slay 
#*Find and slay 
#*Find and slay (To trigger on the Emperor's Terrace, you have to kill , , , , and .)
#Return to 
==Rewards==
*At least 
*