The result of this interaction was previously unintuitive to many players: since that Saga had no chapter abilities, the game defined the "greatest number among its chapter abilities" as zero, and no matter how many lore counters that Saga had on it, it would be sacrificed as a state-based action once it wasn't the source of a chapter ability on the stack (usually right away)
When the chosen creature leaves the battlefield, transform Zenos yae Galvus
It can either take out a big threat or deliver the finishing blow later on
What do they all have in common
For one, your characters tend to be on the beefy side in regards to Will Power, making them something of a nightmare for Steel Song which likes to dish out tons of damage
I tried out different numbers and amounts of life loss, but the Sleeper Agent problem was quite real here: it was hard to get this at a rate where it was fun while encouraging you to keep it or give it away in different games