Put those creature cards onto the battlefield, then shuffle the rest into your library
So, if you want to pay a fair price and have a high chance of receiving your product, stick with products fulfilled by the retailer
Commander Legends: Battle for Baldurs Gate s very own Black Market Connections makes it sing in EDH and makes up a large chunk of the deck's value
For example, if you control The Ozolith ("Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.") when Zack Fair's last ability resolves, you'll put the appropriate number of each kind of counter onto both The Ozolith and the target creature.
This type of deck benefits immensely from removal spells that help its creatures get into the red zone and deal damage to opponents to trigger their abilities
There are game stores that have card 'bins' for a wide variety of card games