Expelliarmus

Expelliarmus 

(Disarming Charm)

1st-level abjuration

Casting time

 1 action

Range

 60 feet

Components

 V,S

Duration

 instantaneous

Process 

This spell is an attempt to knock something out of someone’s grasp. When cast, the target makes a Strength(Athletics) check or Dexterity( Acrobatics) Check against your spell DC . On a failure, the object will fly from the target’s grasp up to 10 feet in a random direction determined by the Dungeon Master.[1]

At higher levels 

For every level higher than 2nd, the spell causes 1d4 of force damage.[2]

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Harry Potter Spell Description

This charm will cause an item that a victim is holding to fly away. If used with more force it can knock out the victim.[3]

Etymology: Probably a combination of Latin expello, meaning “expel”, and arma, meaning “weapon”.[4]