yugioh gx nightshroud deck Red Eyes All 8 Pre-Constructed Decks have

The obvious susceptibility in the above is if your opponent is doing something fast, particularly creature based and fast

Supporters Adventurers Discovery Search your deck for up to 3 Pokmon V, reveal them, and put them into your hand

The Rikka strategy when going first meant it could set up interruptions that were monster negates, which I thought were very good against Tearlaments, or it could set up cards that remove my opponent's monsters from the board, which is really good in against Sprights because the deck needs Level 2 monsters for the engine to go off. With main deck implementation of common side-deck cards like Mystic Mine and Rivalry of Warlords to counter their strength against hand traps with even more options in the side deck for later games, the deck is an oppressive beast going first or second

If you have extra mana, why not get two copies instead of one