What's your favourite example of entrusting hopes to future generations?
There is a foe or system so powerful that it cannot be beaten in the present. So instead, the heroes chip at it, and pass down knowledge/power to those that follow, over and over until finally they break through.
The best example of what I mean is Dungeon Crawler Carl with the Cookbook. But there are others such as the structure of the Expeditions in Expedition 33 and One for All in My Hero Academia.
What other examples of this are there?