Jack Dyllan had a knack for finding trouble. She used to think trouble found her, but how could she blame trouble when she was the lowest common denominator? She had realized long ago that if her day started out with a funny feeling, there would be trouble. And if it started out normally, there would be trouble.
She had make a quick pit stop in Hogsmeade to visit an old werewolf friend, to ensure she had enough wolfsbane for the next few months. As she left the small home, her head happened to turn as her nose picked up a smell she was particularly sensitive too. She followed it, and picked up the pace as she began down the trail that led to the Shrieking Shack's scenic overlook.
Sure enough, there was smoke.
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Devin felt warmth and looked down, finding his jacket on fire. He quickly lost the jacket and it burned atop the ground, as he felt his fury mount. He swung an arm to strike the girl, before yelling "Crucio!"
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BOOM.
The door swung open, falling off its hinges. Jack surveyed the room and recognized Devin and Richard - the former had caused some trouble for the Aurors, and the latter was a known Death Eater. She flicked a wand and Devin was flung backwards painfully, crashing into a wardrobe. She held her wand against the other man. "Everyone stop now, or there will be trouble."
In a panic, Devin fumbled for his wand. "Morsmordre!" The dark mark flew into the air and Jack narrowed her eyes. She beckoned to the younger people. "Behind me. Come on."
Henri raised her wand. "Sectumsempra!" Jack deflected the spell by quickly levitating a floorboard and she boomed, "You will stop now!" She flicked her wand and cords wrapped around Henri's knees, causing her to fall over.
Devin shrieked, "BOMBARDA MAXIMA!" and the room exploded with debris.
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Here are the ones that concern you guys
Crucio - Devin to Hitame - the torture spell
Morsmordre - the dark mark summoning spell
Bombarda Maxima - a large explosion. This one is particularly large and set in the middle of the room