This information is intended for use with the Dungeons & Dragons role-playing game.
At a Glance
Small harmless denizens of the Underdark. They swell up like bullfrogs when exposed to fouled air, so are often used by svirfneblin in mine shafts and other isolated tunnels.
DM’s Notes
Their use as “early warnings” is similar to the mining duty of canaries in our world.
Source
- Drizzt Do’Urden’s Guide to the Underdark [11509] page 10
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