Carlos and Jon are good beats, so if you get a chance to play with them, go for it
Nowadays, Serra Angel doesnt make enough of an impact to be worth spending 5 mana on, especially in Commander
I love brewing with companions and cant wait to see what players can put together with the kor and the kitty
The Confluence costs a massive six mana and three in colors, but you can goad one player's stuff three times, so it's Disrupt Decorum in a four player game, or you can use it as removal of a -3/-3 nature up to three times, which will kill indestructible stuff and not exile them so you can recur them later or you can Regrowth a sorcery/instant up to three times
The second new rarity is "Iconic." These will be rarer than Enchanted, likely making them the most valuable card type in the game moving forward