I've been inviting a lot of people to give eternal a shot and I've been struggling to help them start to understand and play the game. Especially as even the ultra budget lists that I have are pretty much out of their reach right now. I decided to make an alt account and take a look at the cards that all players will have access to right at the start of the game. I'm saving this for my use, but thought I would share it if anyone else might find it useful someday.
This is a complete list of the cards that I might see in a deck that is powerful or fun to play right now. I included alll of the scions out of respect to their power level. I have still never seen Eilyn outside of Gauntlet and I've only seen Kaleb once. When making some alternate starter decks these are cards that you can know they already have.