Destiny Hero – Departed's first effect is a Trigger Effect. It is not optional.
When "Destiny HERO – Departed" is sent to the GY to pay a cost, it is not removed from play.
The first effect of "Destiny HERO – Departed" is a Trigger Effect. It is not optional.
The effect of "Destiny HERO – Departed" is not activated while "King Tiger Wanghu" is face-up on the field because an infinite loop would result. If the ATK of "Destiny HERO – Departed" would become greater than 1400 when Special Summoned, because of another card's effect, it is Special Summoned.