The three main rules are that each player must have a deck of at least 60 cards, each deck can contain only two Ink types (Amber, Amethyst, Emerald, Ruby, Sapphire, and Steel), and each deck can have no more than four copies of a card in it
Another common way of dealing with hexproof creatures involves forcing your opponent to sacrifice them
If you played Magic a very long time ago, then you might be familiar with Vanguard cards
16 cards from the new set would get alternative printings, each featuring an iconic character from the Godzilla series
Spoiler alert: This isn't the last time you'll see this card
Taunt from the Rampart I will happily pay the one extra mana/extra white pip to cast Taunt from the Rampart over Disrupt Decorum if I can only have one (in the right colors)