I'm on day 102 and i got Cardiel about 2 weeks ago. I think i must have opened a grand total of maximum 20 voids so far cuz i have 25 voids, but 4 of them are from the Broadmaw fusion, which do no require shards, and the 5th is Cagebound which i got in some tourney when i began.
I also got Warcaster (not bad) and Azure (trash) as epics. And oh ya, Coldheart too :P
First void lego was tormin, a year or so into the game.
They were extremely thin on the ground for me - i didnt pull another for ages except for jingwon
Everything changed recently i had a flurry of luck as i pulled chaguur, yumeko, venus and torvold within a 2 month period- oh i pulled duchess during this period too but not void.
But it is an epic that has transformed my game the most, i pulled seer recently and it has transformed the game for me.