Frosts of Friendship

As Frosts of Friendship enters the battlefield,
pick any two creatures. Prevent all damage that
would be dealt to either of those creatures by
the other.
"Family is but a bond of blood, and can only go so far.
But to have someone to truly call a friend, that is
powerful. Friendship is unaffected by death and magic
and sorcery. Friendship is hope. Friendship is
everything."