You can Ritual Summon this card with any "Megalith" card. All monster's you control gain 300 ATK/DEF for each Ritual Monster in your GY. You can discard this card; Ritual Summon 1 "Megalith" Ritual Monster from your hand. You must also Tribute monsters from your hand or field whose total Levels equal the monster's Level or more. You can only use this effect of "Megalith Phaleg" once per turn.