His mystery is very strong yes as it cancels buffs and shields which is pretty good and also chaos' for two rounds which is very powerful. That's not all however, he has a pretty strong basic attack which causes ignition and a chase that causes tag which is a nice addition. His barrier is also really strong buffing 3 different elemental attributes so you have more flexibility when creating teams than if you used other barrier ninja (only Onoki so far is the only other ninja to buff 3 different elements I believe). He also has *so a very high chance to dodge the first attack each round(and when I say very high chance I mean practically always), which makes him a really hard ninja to disrupt so you almost always get his mystery off which I said earlier is really strong. So yes he is a really strong ninja.