Could we get more sources for these? Grinding the same nightfall gets boring after awhile, Trails is well... trails. and they're bloody expensive to buy (reasonably so). but thats it... thats the only sources for them, minus the season pass.
So hear me out: Make them have a chance to drop in raids (Prisms from encounters and shards from a clear on a uncommon basis), seasonal activities (Somewhat rarely, higher on potential "heroic" variants) and hear me out... heroic public events (extremely rare)
My reasoning for this is simply due to the fact in D1 two of the main upgrade materials would drop from raids and public events... so why not add them to reward pool?
Obviously don't make them drop like... every 2 - 3 public events, they are meant to be a rare material, but please. give us more sources