You can play characters quickly and start questing for lore early
The obvious susceptibility in the above is if your opponent is doing something fast, particularly creature based and fast
If you have extra mana, why not get two copies instead of one
In Yu-Gi-Oh, trap cards are basically set face down in the magic/trap zone on the field and activated on the next turn or when the activation conditions are met
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
Its also a great list of some of the best Blue MTG cards to get PSA graded
