Like the title states. I had bought a year two Thunderlord from the blueprint kiosk for 150 marks (it was my first exotic in year one, totally worth) and when I went to inspect it, it had a yellow greenish lightning effect instead of the light blue I'm used to seeing. I might just be hallucinating but I'm pretty sure it was never that color and I'm thinking if I infuse it (its 280) something could potentially happen involving the solar and void versions that were hinted at in trailers and screen shots. 100% speculation though. Also I can't play until this weekend so if you want to use me as a test dummy for this, you're gonna have to wait a bit.