The reason, again, circles back to neuroscience
To get it, you have to do that final race (Battle Royale) with the DWE-CG to make the cards you find on the track rarer, then survive the Battle Royale (the one where guys are shooting stuff at you) and collect the cards on the ground while hoping 1 of the ones you receive is the card you need
C Common Judge of the Ice Barrier X WATER Level 4 [ WarriorEffect ] ATK 1800 DEF 900 While you control another "Ice Barrier" monster, each time your opponent activates a card or effect by paying LP, they lose 500 LP
I say this a lot but as an aggro deck, its important to just get the game started on Turn 1
New Duelists can learn the basics of Link Summoning using Code Talker Link Monsters, then use this Starter Deck as a base to build their own unique Deck by collecting Cyberse monsters and Code Talker Link Monsters from many different releases including Structure Deck: Cyberse Link and Extreme Force
They even put sweet new art on it just to fool people into loving it even while it hoses them