Spells-S

Sectumsempra
Slowly bleeds out the opponent.

Seize and Pull Spell
Incantation is "Carpe Retractum". Brings target toward caster.

Severing Charm
Incantation is "Diffindo". Counter-spell to the Incarcerous Spell and the Ebublio Jinx, it also causes a very small amount of damage that drops blood on the floor when the target is not under any spell reversable by this charm.

Shield Charm
Incantation is "Protego". It produces a bubble that deflects spells around the caster, though the bubble is short-lasting.

Silencing Charm
Incantation is "Silencio". Temporarily disables the opponent's ability to view and use the chat.

Snake Summons Spell*
Incantation was "Serpensortia". Summoned snakes that attacked a desired person.

Snake-Vanishing Spell*
Incantation was "Vipera Evanesca". Deleted snakes created by the Snake Summons Spell.

Stunning Spell
Incantation is "Stupefy". Knocks the victim back and temporarily stuns them.

Summoning Charm
Incantation is "Accio". Picks up dropped wands, it also used to pick up dropped apples.