It's sort of like a stronger Tooth and Nail
For example, Umori here mandates that all nonland cards in your deck share a card type, but once its on the battlefield, it makes it easier for you to cast those spells
He's a big fan of Magic: The Gathering and other collectible card games, much to his wife's dismay
Of course, I've mentioned how it's an ok EphemerateEphemerate target, but it's not a primary one, so you might end up having to choose between flickering a card with a good triggered ability and trying to cushion the huge mana investment
And then you get to start making 4/4 Dragon Elementals with flying and prowess every time you manage to get two cards cast on a single turn
To keep it a realistic length, I had to narrow my focus to one-off board games, the kind you can play within an hour or two