Effect
If this card is discarded to the Graveyard: You can target 1 "Mermail" monster in your Graveyard, except "Mermail Abyssgunde"; Special Summon that target. You can only use the effect of "Mermail Abyssgunde" once per turn.
The monster effect of "Mermail Abyssgunde" is a Trigger Effect that activates in the Graveyard.
This effect targets 1 "Mermail" monster in your Graveyard, other than "Mermail Abyssgunde".
The monster effect of "Mermail Abyssgunde" is an optional effect that can be activated when "Mermail Abyssgunde" itself is sent from the hand to the Graveyard. (It can also be activated during the Damage Step.)
The monster effect of "Mermail Abyssgunde" can be activated not only when it is discarded from the hand by a card effect, but also when it is discarded from the hand as a cost to activate an effect.
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