Frightfur Cruel Whale — Ruling

Effetto 1

This card's effect that destroys 2 cards is a Trigger Effect that activates on the field. (It does not target and can be activated optionally if this card is Fusion Summoned.)

This card's effect that sends 1 card to the Graveyard is a Quick-Effect that activates on the field. (It targets 1 Fusion Monster you control and can be activated optionally during either player's turn. During the Damage Step, it can be activated at the start of the Damage Step and before damage calculation.)
Send 1 "Frightfur" card from your Deck or Extra Deck to the Graveyard, except "Frightfur Cruel Whale", and the targeted monster gaining ATK equal to half its original ATK until the end of this turn, are treated as happening simultaneously.