Megalith Unformed (Common) [ETCO-EN070-C]

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.