Forum:Dewdark of the Ice Barrier Againts XYZ

I have a doubt about the Dewdark of the Ice Barrier ruling:

My opponent controls one Utopia and a Dewdark of the Ice Barrier, and he attacks me directly. Can he do that? I know XYZ´s have Rank instead of Level, but the text of Dewdark of the Ice Barrier says:

If the only face-up monsters you control are Level 2 or lower monsters, this card can attack your opponent directly.

But he doesn´t control only level 2 monster or lower he also controls a rank monster, despite Utopias has rank, I thinks he is not meetting the requirements to attack me directly