Two skills say invulnerability. 
In fact, in a jump you can capture and interrupt castes with the help of classes such as Warrior, Valkyrie, Barbarian. 
It is also possible to inflict damage during the "invulnerability" jump. 
The same applies to the use of a third spirit skill. 
All skills of the black spirit of other classes cannot be interrupted, grab them during use. 
And archer skills are possible. 
A question also to skill "Feather in the wind." 
Why 55 skills of other classes cannot be knocked down, but archery is possible?