Igor, Liliana's Assistant

As long as you control a Liliana Planeswalker, Igor, Liliana's Assistant gets
+1/+0 and gains "{b}{b}{t}: Target creature
gains: "{2}{b}{b}: Monstrosity 2 (if this creature isn't monstrous, put two +1/+1 counters and it becomes monstrous)".
What hump?