Bracket Key

Bracket Key is an active item.

Effects

 * Deals 150 damage to all enemies in the room.
 * Prevents additional enemy waves from spawning when used.
 * Increases curse by 1 while held.

Trivia

 * The Bracket Key's description and functionality seem to suggest/pay homage to the fact that the right bracket key on the keyboard was used during development of Enter the Gungeon to automatically clear rooms for debugging purposes.
 * The synergy is a reference to the character Curly Brace from the game Cave Story, where the gun Polaris is also from.