Raviel, Lord of Phantasms - Sacred Beast of Endless Eternity

Cannot be Normal Summoned/Set. Must be Special Summoned with a "Sacred Beast" card. You can reveal this card in your hand; add 1 "Sacred Beast" monster from your Deck to your hand, except "Raviel, Lord of Phantasms - Sacred Beast of Endless Eternity", then discard 1 card. You can only use this effect of "Raviel, Lord of Phantasms - Sacred Beast of Endless Eternity" once per turn. Once per turn (Quick Effect): You can Tribute 2 other "Sacred Beast" monsters; destroy as many monsters your opponent controls as possible, and if you do, this card gains 1000 ATK for each card destroyed by this effect.