If you’ve ever played worms, in it there is an item called the holy hand grenade.
(I used to play a ton of Worms 2 with my friends over 15 years ago—damn I’m getting old)
This item causes a massive explosion that completely demolishes the battlefield, and has been re-created here, though toned down.
Now it also has the added benefit of banishing fiends.
If you’re a cleric of the Gunpowder Domain, you probably carry a few of these around. (*loads gun with religious intent*)
Enjoy! Evan | MonkeyDM
P.S: You can find far more of these items from Cowboys From Hell, including said Gunpowder Cleric, on my Patreon
(Dungeons & Dragons 5e Item)