There probably should be a whole extra post about how good untapped mana and heavy multicolor themes makes for inherently good Standard formats
UR Ultra Rare Sweet Dreams, Nemleria X SPELL Add 1 "Nemleria" monster from your Deck to your hand, then, if you have "Dreaming Nemleria" face-up in your Extra Deck, your opponent cannot activate cards or effects this turn when a "Nemleria" monster(s) is Normal or Special Summoned
An Elite Trainer Box, often abbreviated as ETB, includes at least 8 boosters, 65 sleeves, 6 small damage counter dice, a large die for heads or tails even and odd energy cards, and card dividers
The reprints are cards from the games earliest expansions that would have otherwise rotated from the Core Constructed format
This means if we can get our opponent to 10 life during our turn and immediately cast Hidetsugu's Second Rite, very little can go wrong (apart from our opponent doing something crazy like casting a Lightning Strike targeting themselves, which isn't the worst outcome)