Blast o' Lantern

 is a throwable item obtained from killing Wither Gourds during Spooky Festival, but they can also be crafted. Wither Gourds drop between 2-4 lanterns. The lanterns when thrown explode on impact and deal 2 damage to Spooky Mobs while dealing at least damage to normal enemies, including Slayer bosses.(This damage doesn't take into account the player's  and Combat level) This can be used as an easy method for newer players to gain Slayer xp by throwing a single lantern at Level 2 Revenant Horror, assuming one can obtain them in the first place. (They do more, but how the damage is determined is yet unknown. 3,420 is what they default to when not held in hand and changing lobbies). They can also be used to create Pumpkin Launcher which also uses the lanterns as ammo.

Obtaining
Wither Gourds drop 2-4 lanterns on death, but they can also be crafted with the below recipe

USES
Combat as well as crafting the Pumpkin Launcher