Counterspell

Player's Handbook (2024) p. 258

Level
3
School
Abjuration
Casting Time
1 reaction, which you take when you see a creature within 60 feet of yourself casting a spell with Verbal, Somatic, or Material components
Range
60 feet
Components
S
Duration
Instantaneous
Classes
Sorcerer, Warlock, Wizard, Cleric (Arcana Domain), Blood Hunter (Alt. LaserLlama) (Order of Witch Knights), Ranger (Alt. LaserLlama) (Spellbreaker), Paladin (Redemption), Mark of Sentinel (Legacy), Paladin (Watchers (Legacy)), Cleric (Arcana Domain (UA)), Psion (UA) (Telepath), Paladin (Oath of the Spellguard (UA))

Description

You attempt to interrupt a creature in the process of casting a spell. The creature makes a Constitution saving throw. On a failed save, the spell dissipates with no effect, and the action, Bonus Action, or Reaction used to cast it is wasted. If that spell was cast with a spell slot, the slot isn't expended.