Effect
Cannot be Special Summoned from the Deck. Once per turn: You can change this card to face-down Defense Position. When this card is Flip Summoned: Discard 1 random card from your opponent's hand.
"This card cannot be Special Summoned from the Deck" is not treated as a monster effect.
The monster effect "Once per turn, you can change this card to face-down Defense Position" is an Ignition Effect. (It does not target.)
The monster effect "When this card is Flip Summoned: Randomly discard 1 card from your opponent's hand" is a Trigger Effect. (It does not target.)
The monster effect "Randomly discard 1 card from your opponent's hand" is an effect that must be activated when "Crow of Guld" is Flip Summoned. (The effect activates and a Chain Link is created even if the opponent has 0 cards in their hand.)
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