There will be more cards of a rare and mythic rare power level, but adapting to that (making sure players have more answers at lower rarities) is part of how R&D is adjusting our set designs
This literally wins games
If Yidris is ever allowed to connect with your opponents, then the other players at your table will soon find themselves overwhelmed by the sheer number of threats you control
The creature hits the board, the trigger fires, and you draw cards
Then, when it dies, play the Dread Whispers Adventure for card draw, and replay the knight again
Having access to an effect like this out of the command zone is fantastic, to boot