You can use Sanguine elixer from a Desmodus to finish up the last 30 percent of the tame. I use 4 Voidwryms and net them so they don't fly away. Then net the noglin (didn't reduce effectiveness for me) with the elixer in your hot bar and go up to it and it should light up ready to use, and bam say hi to your new noglin. Didn't see this anywhere and wanted to share

More Noglin Taming & KO Tips