Because their abilities depend on having counters on the board, you've basically replaced your opponent's monster that they've invested a lot of resources in with a (usually weak) beatstick
The Fabled Unicore Type Synchro Monster Attribute LIGHT Typing Beast Level/Rank 4 ATK 2300 DEF 1000 Archetype Fabled Typings Synchro / Effect TCG Date 2011-01-25 OCG Date 2009-10-01 Card Text 1 "Fabled" Tuner + 1+ non-Tuner monsters While you and your opponent have the same number of cards in hand, negate all cards and effects activated by your opponent, and if you do, destroy those cards
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As a soft once per turn if he's targeted by an card you can discard the same type of Card (Monster, Spell, Trap) to negate that effect
But for those thinking there are still gains to be had and are interested in getting into the sealed booster box investment game, what are some key things to remember when youre investing in MTG booster boxes
Burn spells will be cast, either to the dome or to take care of a Birds of Paradise