Dont Move is a huge tempo reset, because not only does it wipe the board of a bunch of creatures, it also makes it much harder for opponents to attack at all in the ensuing turn cycle
Modern became a $1000 format years ago, and Standard is dangerously getting closer to the same numbers or, at the very least, it's been years since it was an accessible entry point for everyone to competitive play
Brenard is a spicy commander to brew around
If you have a deadline, plan ahead
Its also pretty easy to cast this in the end step before your turn and have your Halo Fountain go from being a simple value piece to a game-ending threat
Power is even more condition dependent than the rest of these cards, and the price of a Mox or a Lotus rises and falls by hundreds of dollars based on a single scratch or scuff