Like all the acts featured at Lone Star Music and KOKE-FM’s Dillo Mixer at Threadgill’s World Headquarters (held March 18, 2016 during Austin’s South by Southwest festivities), Uncle Lucius only had half an hour to showcase their soulful blend of Americana roots rock. But the hometown favorites had the crowd grooving from the word go, playing a set drawing largely from their acclaimed 2015 release, The Light — including “End of 118,” sung by guitarist Mike Carpenter.