Now Demetrius and Lysander both love Helena , who thinks they are playing a mean trick on her . The four quarrel with each other until Lysander and Demetrius become so enraged that they seek a place to duel each other to the death to prove whose love for Helena is the greatest . Oberon orders Puck to keep Lysander and Demetrius from catching up with one another and to remove the charm from Lysander , so that he goes back to being in love with Hermia .