Gloop

Alchemy [Alkahest] - Artisan
Time: PT12H
Value: 250 gp

Tools: alchemist's supplies
Ability Check: DC 20 Intelligence check
Properties: fluid, corrosive
Description: This viscous fluid becomes extraordinarily sticky when exposed to air. As an action, you can throw this flask up to 30 feet, shattering it and creating a 20-foot radius area of difficult terrain centered on the impact. Each creature in the difficult terrain must succeed on a DC 15 Strength saving throw or become grappled by the gloop. A creature that starts its turn grappled this way takes 5 (2d4) acid damage. A creature can repeat the Strength saving throw at the end of each of its turns, freeing itself on a success.