5e SRD >Feats >

Contained Green Ooze

Wondrous item, common

As an action, you can make a DC 10 Dexterity check to throw this jar up to 20 feet, shattering it on impact. On a failed check, the jar drops at your location and shatters. Once the jar is shattered, green ooze spreads out to a 15-foot diameter circle that lasts for 10 minutes before dissolving. When a creature moves into or within the area, it takes 1d4 acid damage for every 5 feet it travels.

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Zargoth’s Tome of Familiars, Copyright 2021, Arcana Games, LLC.