Of all Shakespeare's plays, A Midsummer Night's Dream is the most magical. Magic is an element of the supernatural, as it's traditionally believed to come from outside the natural world. In other words, magic is not of this world but can certainly be used in it by those with special powers.
The mischievous fairy Puck has such powers. He uses his magic powers on numerous occasions throughout the play to startling effect. For instance, we see him sprinkle a love potion on the sleeping Lysander's eyes. Puck is supposed to have work his magic on Demetrius, but he gets him mixed-up with Lysander and ended up sprinkling his love potion on the wrong man. As a consequence, it is Lysander and not Demetrius, as Oberon had originally planned, who falls head over heels in love with Helena when he wakes up.
Puck's magic is also on display when he turns Bottom's head into that of a donkey. Unlike the episode with Lysander, Puck isn't acting at the behest of Oberon this time. He's using his magic purely...
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