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Dont worry about making it perfect, or even pretty, just playable

As far as paper Magic goes, the options are limitless

That's a reusable engine, I also have the less synergetic Viscera Seer here too

Riders of the Mark Am I nuts that I think this could make Modern humans lists

Recursion lets you recover them for another round, either by returning them to your hand or giving you another chance to cast them

All in all, as far as Standard is concerned, Solemnity is mostly a sideboard card but a very important one that hits a lot of the most played cards in the format and should help keep several major decks from getting too out of hand