Tracer Rounds

You touch a case or ammo box containing firearm munitions. The bullet glows red hot with heat as it is fired and leaves a discernable trail as it streaks towards a fired upon target within the weapon's range. On a hit, the target takes the physical damage from the weapon plus 1d4 magical fire damage, and the next attack roll made against this target before the end of your next turn has advantage, thanks to the trajectory guidance of the bullet's arc.

If you use this ammunition as the final shot of a gun with the loading property, then you may reload as a bonus action, as the tracer round visually reminds you that your magazine is now empty. Perceptive enemies may make an insight roll DC 15 to discern that your weapon is empty and potentially capitalize on this tactical information. If an enemy realizes you are about to reload and attacks you with the intent to disrupt your reload before your next turn, you are forced to take cover and lose the bonus action reload.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the number of pieces of ammunition you can affect with this spell increases by two for each slot level above 3rd.