The Constipated Grasan produces Grasan Ferment
A grasan that inhales Wiiya gas repeatedly becomes constipated.. poor creature. After a while, the food eaten by the constipated grasan starts to ferment. Grasan ferment can be extracted afterwards and stored for later use. Some find this highly disgusting liquid quite entertaining for its ..side-effects. When you upgrade a grasan to level 2, name it "Constipated Grasan" in order to activate this ability.

Similar 'name triggered' functionality will be available for other creatures over time, sometimes announced, sometimes secret.