lol, Thats clever though =P, my friend created a Rolanberry Mule called "Simurgh" who occasionally spams people with "YOU WANT SUM BOOTS".
(Also dur, its in Aht Urghan Whitegate, theres no chance thats the Actual NM, also because its name is white not yellow)
And maybe you're killing the wrong bats? i've killed it a few times (While messing around for the Jelly Ring and Phaund/Dexer) and its always popped within the first 1-2 bats.