Megalith Unformed

Activate 1 of these effects; ● All monsters your opponent controls lose 500 ATK for each Ritual Monster on the field, until the end of this turn. ● Ritual Summon 1 "Megalith" Ritual Monster from your Deck in Defense Position, by Tributing monsters from your hand or field whose total Levels equal exactly twice its Level.

Quick-Play Spell Card spell