Mill never had the right support to dominate any format, and if the milling failed, the mill deck would be too far behind in the game and lose but in Commander, even with 99-card decks, mill might work with creatures like Bruvac, the Grandiloquent around
That kind of trade-off is usually worth it, especially since Ketramose is hard to remove and comes with menace and lifelink to help stabilize once its ready to attack
Silence + Orims Chant Silence and Orim's Chant might only cost 1 white mana, but their impact in cEDH is hugeboth stop opponents from casting spells for the rest of the turn
He does have great stats for the cost, and basically matches or exceeds Simba Protective Cub who sees a lot of use
It's better the more colors you are playing, and you just need to control it in order to really shut down attacks on you
The useful Sapphire cards help the Ruby characters become powerful pawns that can easily be manipulated using the two Tamatoa character cards and the strong Sapphire Coil item