die by my hands vs die from my hands

Examples:

• He will die by my hands if he doesn't cooperate.
• The villain threatened that the hero would die by his hands.
• She vowed that no one would die by her hands.
• The killer made sure his victims would die by his hands.
• The dictator's enemies feared they would die by his hands.

Alternatives:

• die at my hands
• perish by my hands
• meet their end by my hands
• succumb by my hands
• expire by my hands

Examples:

• The patient almost died from my hands due to a medical error.
• The victim bled out and died from my hands.
• He didn't mean for her to die from his hands.
• The poison caused the rat to die from my hands.
• The accident led to the person's death from my hands.

Alternatives:

• die as a result of my actions
• perish due to my actions
• meet their end because of me
• succumb as a consequence of my actions
• expire due to my involvement