The red light from the magic Lupin had released now reached Snape.
Snape did not even blink. He merely raised his Wand toward the red light and scattered it completely.
The instant the red light dispersed, Snape followed through and swung his Wand. A red light also burst from the tip of his Wand and shot toward Lupin with incredible speed...
"Protego!" Lupin barked the incantation, waving his Wand to draw a "1" in front of him.
Although he barely blocked the red light, he was still sent flying backward, just in time to knock over the Big Black Dog, who had just been about to get up. His Wand slipped from his hand as well and rolled twice across the ground.
"Remus... you only just got through the full moon..." Sirius Black returned to human form and reached out to take Lupin's Wand in his hand. "You're still very weak..."
He roared at Snape, "You despicable, sneaky thing! Just the same as ever! Come on! I'll fight you!"
"Oh... I'm very frightened now..." The sneer remained at the corner of Snape's mouth. "You finally stopped hiding in Azkaban, finally decided not to play the coward?"
As he spoke, he flicked his wrist again with great speed, releasing a Repelling Charm.
Sirius Black failed to react at once. Under the force of the Repelling Charm, he was sent flying backward and crashed into Lupin again, the direction precise to an uncanny degree.
"Snivellus! I'll kill you!" Sirius Black glanced back, and after making sure Lupin was all right, he climbed to his feet with his eyes splitting in fury. "Bombarda!"
A dazzling red fireball burst from the tip of the Wand. The heat radiating from the red fireball warped the surrounding air as it flew straight at Snape.
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