Omens are always considered creatures except specifically when they're being cast as omens , and then only while they're on the stack
Just like Crux of Fate , this can easily be game ender
Even in the late-game, it's useful as then you can get the more impactful Lessons that cost more mana so you can cast them as soon as you add them
The rarity code (SR, SAR, AR, UR, MUR) is printed there in small Latin letters, usually next to the card number (e.g., 123/110 SAR)
Honorable Mention #2 - Man-o'-War Throughout the ages, people have dropped this Jellyfish onto the battlefield and then shouted in victory as the various benefits of said bounce-ery are seen
It's just that there are so many cool Secret Rares in Journey Together that something has to be on the bottom