Gaks doubled down on Zuri's plan and withdrew a spiderweb from her component pouch, which she expanded into a massive spider-web that was interspersed between the plants, reinforcing the difficulty of getting through.

Spoiler: Web, 20 foot cube or as close to that as possible using the plants as supports
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So the wargs and possibly the goblins will need to make dexterity saves at the start of their turns or become restrained, requiring strength checks to get out on subsequent turns. Better yet, if they succeed but are restrained by entangle, starting their turn in the web forces them to make the save vs restrained again.

Wargs:
(1d20)[6]
(1d20)[9]
(1d20)[18]
(1d20)[18]
(1d20)[10]
(1d20)[17]

Goblins:
(1d20)[2]
(1d20)[11]
(1d20)[2]
(1d20)[4]
(1d20)[12]
(1d20)[20]