Megalith Bethor (IGAS-EN039) [Ignition Assault]

You can Ritual Summon this card with a "Megalith" card. You can discard this card; Ritual Summon 1 "Megalith" Ritual Monster from your hand, by Tributing monsters from your hand or field whose total Levels equal or exceed its Level. If this card is Ritual Summoned: You can target cards your opponent controls, up to the number of Ritual Monsters with different names in your GY; destroy them. You can only use each effect of "Megalith Bethor" once per turn.