Let's say I have Saint of Virtue, 8/2, holding the Breastplate of Righteousness, which protects him from Gray and Brown. He's blocked by The Terrifying Beast, 11/12, a Gray/Orange Demon. The battle is currently a stalemate, and Beast was the last card played in battle, so Saint has initiative. He plays Entertaining Angels, interrupting the battle and adding any number of Angels to battle. Let's say he adds Attending Angel, 6/6. The rescuers are at 14/8, and the blocker is at 11/12. Let us say that the battle ends here.
What is the battle situation? Obviously, The Beast is being defeated by numbers, but what about the rescuers? The Beast's Strength is higher than their collective toughness; however, Saint is immune to The Beast while Angel is not. Is it mutual destruction even though Saint would survive? Or is The Beast just losing? Either way, will Attending Angel survive the battle?