Aurelia, the Law Above

Flying, vigilance, haste
Whenever a player attacks with three or more creatures, you draw a card.
Whenever a player attacks with five or more creatures, Aurelia deals 3 damage to each of your opponents and you gain 3 life.

Murders at Karlov Manor

Flying, vigilance, haste
Whenever a player attacks with three or more creatures, you draw a card.
Whenever a player attacks with five or more creatures, Aurelia, the Law Above deals 3 damage to each of your opponents and you gain 3 life.

Murders at Karlov Manor Promos

For both triggered abilities, it doesn't matter what happens to the attacking creatures in response. As long as a player attacked with at least the appropriate number of creatures, the effects of Aurelia's triggered abilities will still occur.