Hypothesis Contrary to Fact (3.5e Maneuver)

"What if when Blargesh stepped out of the tavern, the riding beetles had been startled and crushed that small child? Blargesh must die for his recklessness!"

When an event occurs which a creature within range contributed to somehow, you may use Hypothesis Contrary to Fact on that creature and come up with an alternate course of events that can be differentiated from the actual one by a single conceptual difference (such as some character's reaction to something, or a different roll). Unless the target succeeds on a Will save, all creatures who hear you now treat the target as though they had actually been the sole cause of this alternate course of events, and treats the target as though those alternate events had actually happened. At the end of the duration, the creatures who heard you remember that those alternate events never happened.

If the creature would have actively tried to stop whatever event it was from happening in that alternate way, the creature automatically succeeds on its saving throw.