Card Rulings:Aegis of Gaia

Judge List Rulings

 * When "Royal Decree" is active and a card like "Mystical Space Typhoon" is activated destroying "Aegis of Gaia", the player that was controlling the "Aegis of Gaia" will not lose Life Points, because the effect is negated by "Royal Decree". When "Aegis of Gaia" and "Royal Decree" were simultaneously destroyed by a card like "Heavy Storm", the player that was controlling "Aegis of Gaia" will not lose 3000 Life Points because this is similar to "Call of the Haunted" / "Royal Decree" Vs. "Heavy Storm", in which case the monster Special Summoned by "Call of the Haunted" would remain on the field because "Call of the Haunted" was being negated by "Royal Decree" at the time it was destroyed.

OCG Rulings

 * When "Aegis of Gaia" is removed from the field, its effect which has you take damage does not start a Chain Link.

Semi-Official

 * The OCG text specifies that you take 3000 damage.