Well lanturn volt absorbs it's strongest move, and hp ice is a base 70 no stab move. It's not doing and real damage and while yes you won't break the sub turn one you can whittle it down and get a slow volt turn to break it.Lanturn is a nice Pokemon, doing lots of things Umbreon can't do like check physical fire types, Yanmega, flyers, etc. Lots of good qualities. I am always hesitant to use it though as Sub CM Raikou sets up all over it (even if u carry hp ground lol), meaning that if I don't want to lose to that I need to pack another hard counter. Actually thinking about it, in general standard Lanturn can get set up on by a whole host of things. Perhaps a nice bulky offensive set could be constructed?