Spending $300 on an era toon should have netted a relic’d toon

Out of curiosity, how did you land just g12 after spending $300? I spent nothing but crystals, and only two of my era units are g12 (even got a relic 2 Maul), and I'm pretty sure I could've gotten one of those two to also be relic 0 if I hadn't screwed up and made Barriss level 76.