Grave of the Super Ancient Organism

 Felgrand Dragon, Spiral Serpent and what is possibly Super War-Lion (on the left side of the artwork) appear in this card's artwork.

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The second Spanish name of this card (La Tumba de un Organismo Super Antigüo) has a typo, as the spelling antigüo is wrong (the right one being antiguo), as Spanish diphthongs don't need a diaeresis in syllables ua or uo.

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TCG Rulings

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Even mandatory effects cannot activate while “Grave of the Super Ancient Organism” is active.: Raging Battle -- Card Rulings (version 1.2)

If you chain the activation of “Grave of the Super Ancient Organism” to the activation of a monster’s effect, that monster’s effect will still apply because it has already been activated. “Grave of the Super Ancient Organism” does not negate effects. It prevents both players from activating those effects.

Monsters that were Special Summoned before “Grave of the Super Ancient Organism” will still fall under its effect.

If a monster’s Level is lowered below 6, “Grave of the Super Ancient Organism” will no longer affect it.

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OCG Rulings

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If a Level 6 or higher monster is Special Summoned and then its Level is decreased to 5 or lower, then the monster is unaffected by "Grave of the Super Ancient Organism". The monster can activate its effect and can attack.: Will "Grave of the Super Ancient Organism" also negate the effect of a monster whose Level was decreased to 5 or lower after it was Special Summoned?

"Grave of the Super Ancient Organism" will also prevent the activation of mandatory effects, such as the Trigger Effect of "Chimeratech Overdragon" which sends all cards on your field to the Graveyard.: If "Chimeratech Overdragon" is Fusion Summoned after "Grave of the Super Ancient Organism" was activated, does its effect activate?

The effect of "Grave of the Super Ancient Organism" prevents the activation of effects; it does not negate effects once they are activated. If a Level 6 or higher monster which was Special Summoned activates an effect and "Grave of the Super Ancient Organism" is chained, the effect of the monster will not be negated. However, the monster cannot activate its effect again after the current Chain resolves.: When "Grave of the Super Ancient Organism" is activated in chain to the activation of a monster's effect, is the effect negated?

"Grave of the Super Ancient Organism" also affects monsters that were on the field before "Grave of the Super Ancient Organism" was activated. Such monsters can neither attack nor activate effects.: Are monsters which were Special Summoned before the effect of "Grave of the Super Ancient Organism" was applied unable to attack?

If a Level 6 or higher monster is flipped face-down and then Flip Summoned, or if a Level 6 or higher monster is removed from play temporarily by an effect like "Interdimensional Matter Transporter", then the monster is still considered to have been Special Summoned. Thus, it will be affected by "Grave of the Super Ancient Organism", so it can neither activate its effects nor attack.: Will the effect of "Grave of the Super Ancient Organism" prevent a monster which was Special Summoned from declaring an attack if the monster is flipped face-down?