5 Jasmine (Royal Commodore) Exert, Return, And Reign
Basically, two different styles of decks take advantage of Leyline of Sanctity: fair decks and unfair decks
Deckbuilding in Magic: The Gathering Arena isnt quite as simple as it is in real life for one big reason
While five mana is a bit high for cEDH, what makes Kenrith so good is that if the game gets drawn out you have a lot of options to work with to keep you in the game
The Flayed One gets added to a long list of 3 mana cards that self-mill, but as an artifact, is better than those other options in this deck that cares about artifacts
A 7/7 Eldrazi for 7 mana with seven keyword abilities is nice, and Sire of Seven Deaths can be played in Eldrazi decks, or keyword soup decks