Quick links to identity verification pages are also essential, especially if you want to accelerate withdrawals later
A Harpie Deck full of Floodgates 3 Harpie Queen 2 Harpie Dancer 3 Harpie Channeler 3 Harpie Harpist 1 Cyber Harpie Lady 2 Harpie Lady 1 2 Maxx C 2 Harpies Hunting Ground 1 Harpies Feather Duster 3 Hysteric Sign 1 Elegant Egotist 2 Card of Demise 2 Pot of Duality 1 Dark Hole 3 Harpies Feather Storm 2 Hysteric Party 1 Vanitys Emptiness 2 Icarus Attack 2 Gozen Match 2 Solemn Strike 2 Storming Mirror Force 1 Harpies Pet Phantasmal Dragon 1 Number C39: Utopia Ray 1 Number S39: Utopia the Lightning 1 Number 39: Utopia 1 Gagaga Cowboy 1 Abyss Dweller 1 Castel, the Skyblaster Musketeer 1 Lightning Chidori 1 Tornado Dragon 1 Number 41: Bagooska the Terribly Tired Tapir 1 Evilswarm Exciton Knight 1 Ice Beast Zerofyne 1 Underclock Taker 2 Greatfly

That is, effects such as: Summoning from the deck, adding cards from the deck to the hand or even sending cards from the deck to the graveyard, are immediately negated, which becomes a headache for the current Metagame, as the vast majority of strategies operate based on that
Fierce Guardianship also suffers greatly from its condition, requiring a commander to be a free cast
[1] If you control a "Predaplant" or "Starving Venom" monster: You can Special Summon this card from your hand, then you can add 1 "Polymerization" from your Deck to your hand