I think it's silly for them to talk about "true powers" this early on. Because there's no way this is the last round of Relic upgrades, and it's going to feel cheap if we keep unlocking their true, no for real we mean it this time powers.

But anyway. I hope it's something cool and not just a stat/glow upgrade, but I'm not holding my breath. New abilities, random procs, enhancements to existing abilities would all be very cool.