Firework Rockets

Firework Rockets are consumable Hardmode mechanisms that produce colorful effects. Once placed, a Firework Rocket can be activated via wire or by pressing the button on it directly, which causes it to launch upwards and explode into a colorful effect. Each rocket can only be used once. Firework Rockets are purchased from the Party Girl during Hardmode for each.

Although their effect is primarily visual, Firework Rockets also deal 150 damage, though they only fire directly upward and players are not harmed.

Tips

 * Although they deal a lot of damage to bosses if used in large numbers, the player will need to lure the boss over the fireworks and keep them there, which can be a challenge, especially if the boss dashes or teleports. This strategy may be best suited for bosses that cannot move through blocks, like Golem.Popular Youtuber MappyGaming in particular used this tech to speedkill bosses (take them out in one tick).

History
Feu d'Artifice