Thrayniis is a brown paste prepared from the ayniic flea, a fairly large (1/8") flea native to tropical plains (both tall- and shortgrass) or savannas, where it feeds on most mammals, particularly large herbivores like cattle and antelopes. The ayniic flea itself is quite common, but the knowledge of its preparation into thrayniis is much less common. Ayniic fleas are captured by coating a cowhide with a sticky mixture which usually contains five parts honey, five parts glue, and one part cow urine, then stretching the coated cowhide in the sun on a tree near ground level. The captured fleas are then ground into thrayniis paste with a mortar and pestle. Thrayniis causes paralysis; at minimum, it has no ill effects.