Tsukahagi, the Poisonous Mayakashi — Ruling

Effetto 1

The effect stating you can only control 1 copy of Tsukahagi, the Poisonous Mayakashi is not classified as an Ignition, Trigger, Quick, or Continuous Effect.

The effect that Special Summons this card from the Graveyard is a Trigger Effect that activates in the Graveyard. (It does not target, and can be activated during the Damage Step.)
This is an optional effect that can be activated when your "Mayakashi" monster is destroyed by battle or by your opponent's card effect.
Even if your "Mayakashi" monster is destroyed by an opponent's card effect activated as Chain Link 2 or higher, you can activate this effect.