Hieratic Dragon of Nebthet

The monster effect "You can Special Summon this card (from your hand) by Tributing 1 'Hieratic' monster you control" is not classified as an Ignition Effect, Trigger Effect, Quick Effect, or Continuous Effect.

A Chain Link is not built when Special Summoning "Hieratic Dragon of Nuit" via its own monster effect.

When Special Summoning "Hieratic Dragon of Nuit" via its own monster effect, as a procedure, you Tribute 1 "Hieratic" monster in your Monster Zone, and then perform the Special Summon. (It is not treated as being completed by the act of Tributing.)

The monster effect "Once per turn: You can Tribute 1 other 'Hieratic' monster from your hand or field; target 1 monster your opponent controls and destroy it" is an Ignition Effect. (This effect targets 1 monster in the opponent's Monster Zone. When activating this effect, you Tribute 1 "Hieratic" monster from your hand or your Monster Zone as a cost.)

The monster effect "When this card is Tributed: You can choose 1 Dragon-Type Normal Monster from your hand, Deck, or Graveyard, and Special Summon it, making its ATK/DEF 0" is a Trigger Effect. (This effect does not target.)

The monster effect "Choose 1 Dragon-Type Normal Monster from your hand, Deck, or Graveyard, and Special Summon it, making its ATK/DEF 0" is an effect that must be activated if "Hieratic Dragon of Nuit" itself is Tributed. It activates not only when Tributed by the effect of a card, but also when Tributed as a cost to activate a card's effect, or when Tributed for an Advance Summon. (It also activates during the Damage Step.)