The Knight in Screaming Armor (Give Yourself Goosebumps - 9)

Your cousins, Kip and Abbey, have come to visit you from jolly old England and guess what they have brought with them? Two huge crates, each containing a suit armor and a curse, but it doesn't matter, because you're dying. If you open the crate marked Evil Knight you will be hypnotized by the knight's sparkling medallion and will have to face an ugly sorceress. If you open the good Knight you'll discover a room full of mannequin heads that talk. Before you know it, you've lost your head. Can you pull yourself together before the time runs out?