Student or Learner
Those questions gave rise to the legend that Santa claus lived in the North Pole where his - gift workshop was also located. In poetry and illustrations, Santa clause, in his white beard, red jacket and pompom topped cap, would sally forth on the night before Christmas in his sleigh, pulled by eight reindeers, and climb down chimneys to leave his gifts in stockings children set out on the fireplace's mantelpiece
==> Why do we use "would" here?
Would for past habits
When you are talking about repeated past habits, you can use 'would' instead of 'used to'.
Have a look at the BBC website link for some examples and a practice game:
BBC World Service | Learning English | The Flatmates - Language Point 69