Acid Quake Fonqugon

When Rodnarth's tectonic plates shift and merge, acid spews from cracks in the earth and erupts from volcanoes that spring up suddenly, only to melt themselves just as rapidly when the acid mixes with Rodnarth's lower atmosphere and creates a devastating toxic rain. Exposure to these toxins has wiped out countless species, though some mutate and adapt to resist them—or to sense the earthquakes that cause them.

As an acid quake fonqugon, you're especially attuned to the ground around you and can withstand mild corrosives. You gain imprecise tremorsense with a range of 15 feet and acid resistance equal to half your level (minimum 1).