As for what was removed: Kinnan, Bonder Prodigy Urza, Lord High Artificer Winota, Joiner of Forces Yuriko, the Tigers Shadow Additionally, Food Chain and Deflecting Swat were removed
Duskmourn Commander (DSC) follows the typical release formula for Standard sets: four new Commander decks thematically tied to the main set
It's a really powerful card, albeit a bit too slow and expensive
If multiple replacement or prevention effects try to modify damage that would be dealt to a creature, the controller of the creature chooses the order in which they apply
I forget now, but regardless I was immediately reminded of morph and thus, manifest was born: two cards to make a monster this way
Your assassin typal can use Virtus, but I like the idea of putting it in a Kamiz, Obscura Oculus deck