Wandless magic was not particularly difficult if it was only ordinary magic. Most adult wizards with a little skill could manage a trick or two.
When it came to dark magic or white magic, however, those who could cast without a wand were much rarer.
Last year in the Forbidden Forest, Snape had actually managed to cast the powerful dark spell Sectumsempra without a wand, startling even Black Ginny, who was highly skilled in magic and had seen and experienced a great deal.
Yet even with Snape's talent-he had developed the prototype of Sectumsempra while still a student-and his subsequent hard work, Sectumsempra was the only dark spell he could cast without a wand.
That showed just how difficult it was to use dark magic or white magic without a wand.
Although Lupin's display just now fell short of wandless dark magic or white magic, casting two spells similar to the Disarming Charm simultaneously with his empty hands and precisely knocking away Hermione's and Ron's wands was still rather impressive.
The two wands flew toward Lupin, but suddenly stopped midway and sprang back. A moment later, they were back in Hermione's and Ron's hands.
"Petrificus Totalus!"
"Full-body bind!"
With their wands in hand, Hermione and Ron fired their spells simultaneously. Hermione used Petrificus Totalus, while Ron used a full-body Binding Charm.
Although Lupin had frozen for a moment when the wands returned, his reaction was not the least bit slow when he saw the two young wizards' spells coming. He flicked his old but cleanly washed wizard's robes.
With two sharp cracks, he actually deflected both young wizards' spells with his cloak. Although that section of Lupin's robes was blasted to pieces, his body was unaffected by the magic.
"How is that possible?" Hermione and Ron both looked shocked.
"It's