The Art of War Sun Tzus work is the only art I believe in for Commander strategy
This makes it harder for all players to plan their own turn when many new cards are drawn each time
Without them, there is no local community
Summary Foundations cards are becoming staples in many formats, including Standard until 2029, making them a worthwhile investment
While the effect of making a player lose the game by paying one mana of every color is a nice shortcut, since it requires your opponent to have ten or less life, most of the time you're better off saving that mana for spells since they'll be defeated soon anyways
I could definitely see changing the third Jace, the Mind Sculptor for a Keranos, God of Storms, as this one cant be killed by Lightning Bolt and a later drawn Red Elemental Blast