Stunned

A creature affected by the stunned condition has the following effects:

• The creature's movement speed is halved.
• The creature automatically fails ability checks and saving throws that use Strength or Dexterity.
• All attacks against the stunned creature have advantage, and all the stunned creature’s attacks have disadvantage.
• The creature cannot use its reactions.
• On its turn, the creature can only use an Action or Bonus Action on its turn.
• Can’t make more than one attack a turn, regardless of their abilities or magic items.
• If the creature attempts to cast a spell with a casting time of 1 Action, roll a d20. On a 10 or lower, the spell fails and the spell slot is wasted. On an 11-19, the spell doesn't take effect until the creature's next turn, and the creature must use its action on that turn to complete the spell. On a 20, the spell is cast normally.
• If the creature has an effect active that requires its concentration, it loses its concentration.