Gizmek Naganaki, the Sunrise Signaler — Ruling

Effetto 1

About this card's ② nd effect:
This effect is an Ignition Effect, which can be activated in the Graveyard.
When the effect resolves, choose a Machine monster with equal ATK and DEF from among your face-down banished cards, show it to your opponent, then add it to your hand.
To activate this effect, you can also Tribute a face-down Defense Position monster whose ATK and DEF are the same. (You can also Tribute a face-down Defense Position monster whose ATK and DEF are both "?".)