So, as promised. I will start review your hero.
Stat: Is fine inho.
1) Praying stance
A very unique way to catch prey and bite with.I very like the bite concept which it change the way from normal attack to a new attack mechanism which totally will be awesome when in late game if only if he can farm enough.About the effect,could make it more interesting. Such as : the hp different between mantis and the prey.If the hp of mantis more than the prey than the duration will be increase by 0.1s(example) for each percentage different and vise versa.That will be nice too.
A nice skill which fit his theme and real life mantis.I saw animal planet before,said that mantis had remarkable speed and high skill of camouflage to catch his prey.So does this skill, giving the same function for catching a prey.I like the transparency effect.But i quite dont understand what the mean about the vision lost about the degree.Mind to explain it??
A mantis which can jump.Less see mantis jump until now.But it is good also which the skill effect.Synergy is very good.Able to jump between tree.Totally awesome.
A new and unique skill i think.The duration of 3.5 seconds, which this skill is able to spam.But the distance jump is totally too far if this cd is very low.Imagine mirana , she leap skill has 18s cd and it only leap 840distance. While yours able to leap 350 distance with 3.5s cd.So,14s you can leap 1400 distance!! Totally imba.Hope you can change it.
Mantis that hide in a tree?? Well , it fine since i saw some hide between rocks or grass.
And a new unique concept again , with hiding in the tree, which 3rd skill able you to jump between trees.
Overall, a unique hero and very solid idea which may be another most like hero suggestion. GL!!