Overall, it can be a solid addition, especially in a deck that can maximize its entry effect
Its also potentially a way to just trigger Killian a whole bunch of times, while also making sure your creatures will be protected in the future
If you want some inspiration for meta decks, tournament successful lists, or wanna see different strategies, look at the completed results from a recent Late Night Event here: You can import a deck from one of those events by copying it to your clipboard and pasting it right into PTCG Live
The ideas initially were rejected mostly because they would be too hard to implement or track in paper, but in a digital environment, these ideas could have a second chance
As you can see from the artwork here, all four in each set are a variant of a theme, with a creature from the game looking over the land around them in a particular kind of season