What do the Muton abilities do?
Mutons are large green troops that tend to carry plasma rifles and grenades. Often I see them use two abilities. Intimidate and Blood Call.
What are the effects of Intimidate and Blood Call?
Intimidate causes your soldiers to have a chance to panic. It is a trigger reaction only if it takes damage from a shot (but not killed).
And from what I can tell, blood call increases nearby Muton's effectiveness by increasing (Thanks to Raven Dreamer for the right stats): - Aim - Will - Movement Distance