Raviel, Lord of Phantasms - Shimmering Scraper

[ Fiend / Effect ] Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by Tributing 3 monsters. You can only use each of the following effects of "Raviel, Lord of Phantasms - Shimmering Scraper" once per turn. ● (Quick Effect): You can discard this card and target 1 "Raviel, Lord of Phantasms" you control; for the rest of this turn, its ATK becomes double its current ATK, also it can attack all monsters your opponent controls once each. ● If this card is in your GY: You can Tribute 1 monster; add this card to your hand. ATK/ 4000 DEF/ 4000