Mermail Abysspike

Per-phrase breakdown

• When this card is Normal or Special Summoned: You can discard 1 WATER monster to the GY; add 1 Level 3 WATER monster from your Deck to your hand. (Trigger)
• You can only use this effect of "Mermail Abysspike" once per turn. (Condition)

Judge-facing facts

• Normal Summon / Set from hand uses no tributes (Level 4).
• The effect to add a Level 3 WATER monster is a Trigger Effect that activates when this card is Normal or Special Summoned.
• This effect does not target.
• Discarding 1 WATER monster to the Graveyard is the activation cost.
• You can only use this effect of "Mermail Abysspike" once per turn.

Card-specific notes from database

• (Konami neuron) This effect can be activated during the Damage Step.
• (YGOResources) Because the activation cost specifies discarding "to the Graveyard", this effect cannot be activated while an effect that banishes cards sent to the Graveyard (such as "Macro Cosmos") is applying.