From what I've seen and read, the $150 pass will give you access to a heroic character this first time. That's the only way to get it. Similar to Excalibur Prime in the first founders pack in Warframe. Good explanation though. I'm pretty excited the game is coming this week!
I did not understand one thing. So you need tower key to unlock a reward right? I see that I can buy tower key for 150 runesilver. Is this it or do we get tower keys by playing? possibly for what do we get them? leveling or drops from mobs/ chests / dungeons?
You can get keys in game while doing content, there is an exp bar that will be filled while you do content in game, every time it fills you get one key. But, it’s quite a grind