Superheavy Samurai Security - Duelist Nexus (DUNE)

If this card is Normal or Special Summoned: You can add 1 face-up Machine Pendulum Monster from your Extra Deck to your hand. If you have no Spells/Traps in your GY: You can Tribute this card; Special Summon 1 EARTH Machine monster with 1500 or less ATK from your hand or GY, except "Superheavy Samurai Security". You can only use each effect of "Superheavy Samurai Security" once per turn.