The Elder Wand is one of the three Deathly Hallows, and you have become its master. This wand will always be loyal to you and you alone, significantly amplifying any magic it casts. You can make charms and transfigurations permanent, and charms become more potent. In a duel, you will almost always emerge victorious against someone weaker than you, but you will be challenged when it comes to someone of equal or greater strength.