You can reveal this card in your hand; immediately after this effect resolves, Normal Summon 1 "Dark Tuner" monster. You can only use this effect of "Dark Tuner Catastrogue" once per turn. Once per turn, if you control this Normal Summoned/Set card: You can Tribute both this face-up card and 1 face-up non-Tuner with a lower Level, and if you do, Special Summon 1 Synchro Monster from your Extra Deck with a Level equal to the difference in Levels of those monsters (this is treated as a Synchro Summon), then you can destroy 1 card your opponent controls.