Main sets (so far) have each had 204 numbered cards with rarities from Common to Legendary
You rarely recover from many of these destruction moves, as only one card, the aforementioned Song of Inspiration, allows you to bring creatures back from the graveyard
Credit: Wizards of the Coast Paranormal Analyst BPhillipYork: Well thats a way to make manifest dread really strong, fun for that kind of deck, but as a singular effect not really strong enough to build around
But that's hard to make work and easy to disrupt with removal of the Commander himself or by the Anthems (Glorious Anthem), Auras (Rancor) or Equipment (Bonesplitter), and if you sweep you really break him with mass removal, and recasting a five cost is rough
Even when I have some obvious direction to take things, these ratings can catch subtle and unique connections between cards which might not otherwise come up
When it comes to power level, I would put this roughly on par with a lot of the recent Commander offerings