Neil Warnock's side were on the end of a 4-0 hiding at home to Scunthorpe on Saturday and Magilton is expecting a backlash when they make the short trip from south to west London.
"We've got the chance on Tuesday to take the game to Palace," said Magilton.
"But they are a side who will scrap and fight, especially after their result on Saturday. They will come here and give us our most difficult game of the season without a shadow of a doubt. Neil Warnock will want a performance."