You can have a good record with a Historic aggressive creature deck, or a mono-red burn deck in Timeless, because these decks dont rely that much on Timeless-only cards, but the competition will be fiercer, and Timeless is home to many broken combos as well
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Its ability to negate all Spell Card effects is detrimental to so many strategies that it wasn't able to come off of the Forbidden and Limited list until it had its card effect changed, where now players are forced to pay the 700 LP cost to keep it on the field, and can't simply choose not to in order to get rid of it and allow them to use Spell Cards on their turn
Neither player can target this card with effects of Special Summoned monsters, except those Special Summoned from the GY
In fact, youll notice that, unlike most Lockdown decks, our list does not play any counter traps or other protection spells