This is a fundamental pivot designed to pull new players directly into the core Magic experience, solving both the new player onboarding problem and reducing churn in eternal formats
Pair it with something that untaps creatures when it enters the battlefield, and the loop creates infinite hasty tokens, which usually ends the game on the spot
Though the essential action of putting a card from the library into the graveyard happens with manifest dread, the mechanic does not count the card as a milled card and won't trigger effects that care about milling
You never want to be in top deck mode, but it's nice to have a card that rewards you for being in a precarious situation
It's the classic Circle of ProtectionCircle of Protection, which no version of, not even Story CircleStory Circle, has ever been playable in Commander
For a common card, thats an astounding number of places to be illegal to play, but theres a good reason for it