Shi-En offered the deck a method to negate any spell/trap card that might disrupt play, and only became more powerful in conjunction with Great Shogun Shien, limiting your opponent to one spell or trap card per turn
The only limit on the deck size is that you have to be able to shuffle it on your own without assistance, and that your sideboard can be no larger than 15 cards
"We knew we had a new opportunity here to create cards that would really appeal to our Commander players." These boxes almost feel like little build-your-own Commander precon kits: each one has that multicolored legendary, some brand new cards that support their mechanics, and some packs to get your collection going
The other three are Misty for energy gain, Giovanni for extra damage, and Sabrina to force the opponent to switch their active card
add 1 monster with 3000 or more ATK from your Deck to your hand, then, immediately after this effect resolves, Normal Summon it