You can Tribute 1 Tuner monster; Special Summon 1 "Synchron" monster from your Deck with a different Level than the Tributed monster had on the field. During your opponent's turn, if you Special Summon a Synchro Monster from your Extra Deck: Target 1 card on the field; shuffle it into the Deck. You can only use each effect of "Starlight Junktion" once per turn.