Summon this with Psychic Tracker as non-Tuner, and its ATK becomes 2600, meaning anything with 2500 or less ATK cannot attack, and anything with 2700 ATK or more cannot activate their effect.
Which should affect most monsters in the game as monsters with exactly 2600 ATK is not common or easy to achieve.
Yeah, 2900 ATK works too. In fact it may be even better. 2900 ATK is easier to boost into more than 3000, and most 3000 ATK monsters in the game right now, are way less useful if they cannot attack (Reactor Dragon is a good example of this, as its effect only protects it when it attacks, and it only destroys a card with its effect after it attacks)
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Anon