Mermail Abyssmegalo

The monster effect "①: You can discard 2 other WATER monsters from your hand; Special Summon this card from your hand" is an Ignition Effect that activates in the hand. (This effect does not target. When activating this effect, you discard 2 WATER monsters from your hand as the cost.)

The monster effect "②: When this card is successfully Special Summoned by the effect of ①: You can add 1 'Abyss' Spell/Trap Card from your Deck to your hand" is a Trigger Effect. (This effect does not target.)

The monster effect "③: You can Tribute 1 other face-up Attack Position WATER monster you control; this card can make a second attack during each Battle Phase this turn" is an Ignition Effect. (This effect does not target. When activating this effect, you Tribute 1 face-up Attack Position WATER monster in your Monster Zone as the cost.)

The monster effect "this card can make a second attack during each Battle Phase this turn" can only be activated during your Main Phase 1. Furthermore, it cannot be activated if you cannot conduct a Battle Phase, such as during the first turn of the duel or a turn in which "Soul Charge" was activated.