Chaos, as the name implies, is meant to create the most complicated game state possible
Tamiyo, Inquisitive Student / Tamiyo, Seasoned Scholar Tamiyo is a strange card in that it's a creature that provides value by being in play, but it doesn't do real damage to the opponent
Having a solid plan for sideboarding is important for three reasons: You identify which cards you will be taking out and putting into your deck , as swapping out the wrong cards could greatly hinder your deck's ability to function
And, like the most powerful creature in the Yu-Gi-Oh
Dance Princess of the Ice Barrier X WATER Level 4 [ SpellcasterEffect ] ATK 1700 DEF 900 Once per turn, if you control another "Ice Barrier" monster: You can reveal any number of "Ice Barrier" monsters in your hand, then target an equal number of Set Spells/Traps your opponent controls
"Millennium Ankh" is critical for the Deck, Summoning "The Unstoppable Exodia Incarnate", but shuffling non-"Millennium"/"Exodia" monster cards to Deck and locking you from Summoning for the rest of the turn