Protect Your Creatures
A great way to prep for a pre-release or drafting in general is to know what cards can affect your board. Here’s a list of commons that’ll be game changers or have a board affect that you’ll see more often. Take note of card type and mana cost.
These are the cards that can destroy your creatures or surprise you in combat. Creatures, enchantments, artifacts, etc., are not listed because you'll be able to read what they do. It helps to memorize the mana costs, because if your opponent plays those colors, they will likely have these cards in their deck.
Good luck in your prep for the new set!