These spells were used to counteract the effects of Alohomora and presumably other opening spells such as Annihilare, Dunamis, Emancipare, Liberare, and another, unidentified spell. Aqua Eructo Charm The Aqua Eructo Charm (Aqua Eructo) is a charm that can be used to create a spout of water from the tip of the wand.
Curse spells (or Curses) are a subclass of Combat spells in the arts of Magic and are mainly used to cause a negative effect to the caster's target other than damage. Curses are an underused part of Magic, mainly because spellcasters have little time to waste on casting non-combat spells.
The Dark Arts encompass many spells and actions ranging from the powerful Unforgivable Curses to brewing harmful or poisonous potions to breeding Dark creatures such as Basilisks, Dementors or Inferi, and its practise is often illegal or at least discouraged.
A Jinx is one of the seven known spell types, affiliated with dark magic and distinguished by their negative effects used mostly for the amusement of observers and the minor discomfort of the victim. Jinxes can also be used in a defensive capacity, and hence students of Defence Against the Dark...
Protective enchantments are spells used to protect an area that the caster wants protected. The spells that are cast usually last a long time and shield specific places that the caster intended to shield. There are many different types of protective enchantments.