mtg mono black cards Elite Rat Deck - Discard - Very Powerful - Modern Legal - Custom Built - Magic The Gathering - What's your thoughts on this

Cards like Crucible of Worlds will help you bring valuable lands back to the battlefield so you can sacrifice them again and again for endless utility

Yes, a lot of their cards will be better than Shock, unless you were playing Limited back then in which case they might not have any such cards, but better enough

I do have to cast it during combat and the token gets exiled at the end of the turn

these decks are equipped with the best reprints of the commander format and no less than 10 impressive brand new commander cards

I also found the slider at the top of this store page convenient, since it highlights sets which are and are not legal in Standard