[6] If youre not happy with your starting hand, you can take a mulligan by shuffling the cards back into your deck and drawing 5 new cards
Power level is a term that we use to evaluate the effectiveness of a particular deck in Commander
If Weeping Angel would deal combat damage to a creature, prevent that damage and that creature's owner shuffles it into their library
Honorable Mention 1 Wight of Precinct Six Later in the game, this is a 2-drop that can blast people for a lot of damage, but it sucks early, when its 2-mana cost would be a nice advantage
Ive also excluded cards that shut down artifact abilities : Collector Ouphe, Karn, the Great Creator, etc
Connive is perfect for helping filter your hand, getting key reanimation targets in the graveyard, and making a creature massive