Chronomaly Crystal Bones

The monster effect "If your opponent controls a monster and you control no monsters, you can Special Summon this card (from your hand)" is an effect that is not classified as an Ignition Effect, Trigger Effect, Quick Effect, or Continuous Effect. (A Chain Link is not built when performing a Special Summon this way.)

"Chronomaly Crystal Bone" is a Normal Summon monster. (Even if it has been sent to the Graveyard from the hand or Deck, it can be Special Summoned by the effect of "Monster Reborn".)

The monster effect "When this card is Special Summoned this way: You can target 1 'Chronomaly' monster in your hand or Graveyard, except 'Chronomaly Crystal Bone'; Special Summon it" is a Trigger Effect. (It does not target.)

The monster effect "When this card is Special Summoned this way: You can target 1 'Chronomaly' monster in your hand or Graveyard, except 'Chronomaly Crystal Bone'; Special Summon it" is an optional effect that can be activated when "Chronomaly Crystal Bone" is successfully Special Summoned from the hand by its own monster effect.