Based on my limited knowledge of the new format, I expected revitalized beatdown decks like Zombies and Humans to perform well
For decks that are playing multiple similar effects including both white and red, I suspect that well begin to see this card push out the classic Rule of Law and other less efficient options
You may reveal a creature card from among them and put it into your hand
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Moreover if you do the math, drawing many cards gives you card advantage and access to all other aspects of your deck more quickly, so you have greater chance to have access to more lands, ramp, removal, utility, creatures, combo pieces, even more card draw and any other strategy you may run in your deck
When Hildibrand Manderville dies, you may cast it from your graveyard as an Adventure until the end of your next turn