If I am not mistaken you can also get it by doing all the ascendant challenge time trials.
The well has the "drink at the well" variance of the emblem which should unlock the base version as well.
The time trial variant "transcendent" should also award you the base version.
Well is grind, tiem trials is time gated, so whatever you prefer.
https://www.light.gg/db/items/3352019292/secret-victories/