'No cost too great' is an iconic and recurring line said by the Pale King from the game Hollow Knight. It is often humorously used in situations where a person does something that is too much work, just to reach their goal, e.g. sacrificing thousands of your children just to chain and lock one for years to contain a moth God.
Person 1: "YOUR HIGHNESS, ISN'T THIS A BIT TOO MUCH?"
Person 2: "No cost too great."
Person 1: "SIRE, YOUR CHILD IS BURNING!"
Person 2: "No cost too great."
Person 1: "SIRE, YOUR CHILD IS BURNING!"
by CheesemanLloyd April 21, 2022