Arania Exumai- This spell is used to blast away Acromantulas and, presumably, all other arachnids.
Arresto Momentum- Used to decrease the velocity of a moving target; it should be noted that it can be used on multiple targets, as well as on the caster himself.
Ascendio- Lifts the caster high into the air.
Avada Kedavra- Causes instant death to the victim wherever it hits on the body, is accompanied by a flash of green light and a rushing noise; there is no known counter-curse, although there are a number of ways to prevent death by it, such as hitting it with another spell in mid-flight, dodging it, or interrupting the caster. It is one of the three Unforgivable Curses.
Harry Potter was saved from this spell a number of times, both by his mother's sacrifice, because he was an accidental horcrux, and because his wand and his enemy's were made of the same core.
