Double
If I wake up omnipotent, I will change the world in such a manner that anyone causing pain to another living being would immediately feel that pain themselves in double measure and for twice as long as the victim does.
If someone kicked a dog, they would feel the dog’s pain twofold.
If someone tried to bully their child, they would feel the fear doubly.
If someone hit their spouse, they would feel both the physical and mental anguish in double measure.
If someone tried to embarrass another person by posting their embarrassing video online or by posting offensive remarks on their social media, they would immediately feel double the amount of shame as their victim.
And would continue to experience these damaging feelings twice as long as the victim felt it.
Violence or trauma of any kind would become impossible to inflict without causing double the damage to oneself.