As long as you have basically anything that can saddle it, Calamity comes down swinging and brings a few extra friends along for the ride, even better if the copies you create have enter-the-battlefield effects
While Mill X cards like Wall of Lost Thoughts will churn through four cards for two mana, which isnt a terrible mana to mill ratio, without top deck knowledge theres no way of knowing what exactly youre putting in your graveyard
I snagged The Abyss in pack two, which notably does not affect artifact creatures, and in the third pack I actually took Tinker over Mox Emerald because Tinker was more likely to lead to a broken start in my deck at that point, and had significantly more value later in the game
In theory, this is true, but the fact that Wizards tied the unbanning to the release of Masters 25 and didn't issue an explicit warning about the possibility of rebanning the planeswalker in the future if things go wrong means that rebanning Jace, the Mind Sculptor in the near future (within the next year or two) will come at an extremely high cost