Explosive barrels are three-part containers filled with unstable materials, utilized by goblins as a defensive measure on a bridge over an underground chasm. These barrels detonate when jostled, ignited, or if they collide with one another. The goblins recognized their dangerous nature, noting they could be shaken and thrown before exploding. Previous attempts to use these explosives against a guardian beast resulted in the disappearance of those involved, highlighting the significant risks.
In planning to confront the guardian beast, negotiations occurred with the goblins to repurpose the barrels. The tactical situation worsened when the guardian beast displayed intelligence that altered the party's strategy. Draz shot an explosive barrel, creating a massive blast that injured Heyou and freed the guardian beast from a mystical tether. The beast closed in on the party, prompting a series of detonations, including one triggered by Sylvie's magic, which helped defeat the guardian beast. However, a goblin inadvertently caused a catastrophic explosion while carrying another barrel, destroying the sacred tree and severely affecting the surrounding area.