Their value has skyrocketed over the years, with some cards fetching millions
Buy a box for DON card variety
negate the effects of that opponent's monster while it is face-up until the end of this turn, that monster you control cannot be destroyed by that battle, also your opponent takes any battle damage you would have taken from that battle
In the animal kingdom, bats use a similar method called echolocation which uses high-frequency sounds to help the bat determine how close it is to a destination, even in total darkness
So, the lower the millisecond ("ms") count, the better

This deck contains the following cards:Extra Deck (x15 + x4 Bonus):Gem-Knight Master Diamond Dispersion (x1) - Secret RareGem-Knight Lady Brilliant Diamond (x1) - Secret RareGem-Knight Master Diamond (x1) - Ultra RareGem-Knight Prismaura (x1) - Ultra RareGem-Knight Amethyst (x1) - Ultra RareGem-Knight Aquamarine (x1) - Ultra RareGem-Knight Ruby (x1) - Ultra RareGem-Knight Citrine (x1) - Ultra RareGem-Knight Topaz (x1) - Ultra RareGem-Knight Zirconia (x1) - Super RareGem-Knight Phantom Quartz (x3) - Super RareGem-Knight Lady Lapis Lazuli (x3) - RareGem-Knight Lady Rose Diamond (x3) - CommonMonster (x28):Gem-Knight Hollowcore (x1) - Secret RareGem-Knight Alexandrite (x3) - Ultra RareGem-Knight Lazuli (x2) - Super RareGem-Knight Crystal (x2) - Super RareGem-Knight Quartz (x3) - CommonGem-Knight Lapis (x3) - CommonGem-Armadillo (x2) - Ultra RareGem-Merchant (x3) - Super RareGem-Turtle (x3) - Super RareGem-Elephant (x3) - CommonBrilliant Rose (x3) - CommonSpell (x6):Absorb Fusion (x1) - Secret RareGem-Knight Dispersion (x1) - Secret RareGem-Knight Fusion (x1) - Super RareScatter Fusion (x3) - Super RareTrap (x6):Brilliant Spark (x3) - CommonCall of the Haunted (x3) - Common This deck contains the following cards: Extra Deck (x15 + x4 Bonus): Monster (x28): Spell (x6): Trap (x6):
