Unity

Unity is a passive item.

Effects

 * Increases damage based on the other guns the player has.
 * 2% of the total damage of the player's non-equipped guns is added as flat damage to the player's currently equipped gun.

Trivia

 * "Our Powers Combined" and the ring design is a reference to Captain Planet. The synergy also suggests this.
 * Enter the Gungeon is built on the Unity game engine, hence its synergy with the Gungine.
 * The synergy is a reference to players often asking game programmers what engine they use, and associating the answer with positives or negatives of other games that use the engine.
 * The synergy  is a reference to programming languages or development environments freeing up memory no longer needed by an application. This is why the synergy causes a freezing effect: when garbage collection begins on an application they might initiate the dreaded "Stop-the-World" event, which freezes the entire application during garbage collection.