Ancient Gear Engineer

 As one of the original four Ancient Gears (along with Soldier, Beast and Golem), its ATK is equal to its DEF.

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This card is the only Ancient Gear monster able to negate Trap Cards, as well as destroying Traps and Spells after Damage Calculation.

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This card's effect is identical to that of an anime-only card, Glory Shield.

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OCG Rulings

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The effect "Negate any Trap effects that target this card, and if you do, destroy that Trap Card." is a Continuous Effect.: Ancient Gear Engineer

The effect "If this card attacks, your opponent cannot activate any Spell/Trap Cards until the end of the Damage Step." is a Continuous Effect.

The effect "At the end of the Damage Step, if this card attacked: Target 1 Spell/Trap Card your opponent controls; destroy that target." is a Trigger Effect. (It targets 1 Spell/Trap Card your opponent controls. It is always activated at the end of the Damage Step in which "Ancient Gear Engineer" attacked.)

Even if "Ancient Gear Engineer" attacks and is destroyed by battle, the effect "Target 1 Spell/Trap Card your opponent controls; destroy that target." is activated at the end of the Damage Step.

The effect "Target 1 Spell/Trap Card your opponent controls; destroy that target." is activated at the end of the Damage Step in which "Ancient Gear Engineer" attacked. However, if "Ancient Gear Engineer" attacks a face-down Defense Position "Shaddoll Squamata", and "Ancient Gear Engineer" is destroyed and sent to the Graveyard by the effect of "Shaddoll Squamata: If "Ancient Gear Engineer" attacks, and is destroyed by the effect of a flipped face-up "Shaddoll Squamata", is the effect of "Ancient Gear Engineer" activated?

Previously Official Rulings

"Ancient Gear Engineer's" effect activates at the end of the Damage Step (when monsters destroyed by battle are sent to the Graveyard). If it is destroyed by battle, or removed from the field by a card effect before then, its effect will not activate.