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• Grants a +2% damage bonus for each enemy killed. The effect maxes out at +150% weapon damage (75 consecutive kills). The bonus is reset if the player takes damage, changes guns, or drops their gun.
• Picking up a new gun does not reset the bonus, effectively transferring the bonus to the new gun.
• After each kill, a tone will play and a small note will appear above the player's head. As the damage bonus increases, the tone will become higher-pitched and the note will change color. The note is red when the bonus is maxed out.

• Metronome will not reset when the item itself ( not the gun you're holding) is dropped, essentially allowing you to swap guns without losing the bonus damage up.
• Adding currently equipped guns to a Muncher will reset the bonus as if switching guns.
• Playing [Winchester] 's minigame will reset the bonus.
• Receiving and losing the [Windgunner] from [Sprun] will not reset the bonus.
• Enemies killed by any indirect means, such as through the Burn or Poison Status Effects , being killed by explosive damage, or being knocked down a pit, will not increment this item's bonus. This includes explosive damage from guns, such as [Big Shotgun] or [Grenade Launcher] .
• Transmogrified enemies killed by a gun will increment the bonus. Killing a transmogrified enemy by walking over it will not increase the bonus.
• The effect will trigger when killing any enemy, including illusions such as those spawned by Killithids , the harmless blob left over by Blobulord , chickens, and the hint rats .
• Companions and other passive items that fire bullets can also trigger the effect.
• The effect will not trigger if an enemy is killed by [Strafe Gun] or [Cat Claw] 's explosions, however it will trigger if killed by the impact of the nails.
• The effect will not be triggered upon killing an enemy with the [Mourning Star] , as the orbital laser it summons is not counted as a projectile from the gun.
• Metronome will reset upon completing the Gunsling King 's challenge if you were given a gun to use for the challenge.
• Metronome will not reset upon gun swap during Blessed Runs caused by the Sorceress , making Blessed Runs much easier.
• If duplicates of this item are somehow obtained, allows each Metronome to activate their individual effect when the player kills an enemy. If the player takes damage, changes or drops their gun, all of the Metronomes bonuses will reset. The number of Metronomes represent the number of small notes appearing after a kill. The oldest Metronome's note will appear at the very top while the newest will appear at the very bottom.
• The bonus will not reset when switching [Chamber Gun] modes

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