Tour Bus From the Underworld

The monster effect of "Tour Bus From the Underworld" is a Trigger Effect that activates in the Graveyard. (It is an effect that targets 1 monster in either player's Graveyard.)

The effect of "Tour Bus From the Underworld" is a mandatory effect that activates when it is sent to the Graveyard. It activates not only when sent from the field to the Graveyard, but also when sent from the hand or Deck to the Graveyard. (It also activates during the Damage Step.)

The monster effect of "Tour Bus From the Underworld" activates even if "Tour Bus From the Underworld" itself is sent to the Graveyard as a cost to activate a card's effect, or if it is sent to the Graveyard by the effect of a card activated in a chain of 2 or higher.

You can also target a Fusion, Synchro, Xyz, or Link Monster in the Graveyard for the monster effect of "Tour Bus From the Underworld." (In that case, the targeted Fusion, Synchro, Xyz, or Link Monster returns to its owner's Extra Deck.)