Hey,
from my knowledge it doesn't work and
master of cruelties is a special rule case due to the added phrase of "isn't blocked" but since Kaalia has the creature come into play attacking all the attack triggers don't activate.
It is required for those kinds of triggers that the corresponding creature declares an attack which isnt the case here.
I asked our local lv 2 judge after building the deck, so it shoulf be a reliable source