Punishing an opponent for killing a creature feels very good, and Kairi, The Swirling Sky is powerful enough that opponents will have to deal with it at some point
It also includes spells and abilities that can't be countered
Well of Ideas stands to draw you more cards than your opponents but will still make them happy while Dictate of Kruphix is a Howling Mine effect that can be flashed in on the turn before yours making sure that you get first dibs at extra cards
Despite all looking similar, double-faced cards are used in very different ways, and knowing the differences between them is essential
If you're looking to add some to your decks, here are ten that are powerful, popular or both: Wall of Omens/Wall of Blossoms If there's one thing commander players love doing, it's drawing cards, and in the right deck these two Walls can do that a lot
As I have done more of these top X lists it has felt ever more pertinent to compare stricter categories as it is much more useful for cube design, deck construction and understanding the things that make those kinds of cards good