You can
cause one intelligent creature to remain calm as
you speak. The creature doesn’t need to speak
your language, but it must be able to see you.
It remains calm as long as you focus all your
attention on it and it is not attacked or otherwise
threatened. In addition to the normal options
for using Effort, you can choose to use Effort to
calm additional creatures allied with your initial
target, one additional creature per level of Effort
applied.