Example: I go out with Michael (numbers:12/8) and my opponent blocks with Fallen Warrior (2/2). He can play whatever he wants that doesn't remove me from battle, and it still won't be my initiative. He could, for example, use Pride of Simon and get something back from his discard pile. However, the moment he plays Overwhelmed by Philistines or Wrath of Satan, even if his numbers are still far lower than Michael's, I can negate since Michael would be removed from battle.