User blog comment:NickNig/Mariudeth Leaderskill Question/@comment-25251916-20141003041054/@comment-25251916-20141003050215

I would say it's a lil weird as well considering that the 4* form of Mariudeth has the same leader skill name as 4* Zebra. That gives off a 200% increase in critical damage, even for Mariudeth. Then it lowers itself down to 100% as Mariudeth becomes 5*, which gives off a different name as "Flashing Edge."

I think the main reason for tis is because of how Zebra was nerfed in Japan. This caused his leaderskill to only increase up to 150% instead of the 300% we have in Global. Supposedly, Flashing Blade gives off a weird 200% increase but it's only a 50% increase in the Japanese version. It might be a bug but who knows, it might be ended up fixed later.

IF Global followed the same route as JP later on and nerf Zebra, Mariudeth will then become more viable to use.