Hear me out, because Sol Ring is far more obscene than Mox Sapphire could ever hope to be
all three cards are double-sided, providing two different pieces of art, though mechanically they are considered single-faced cards
Although fear grips the populace, hope remains in a prophecy: "When darkness veils the world, four Warriors of Light shall come." One fateful day in the kingdom of Cornelia, four young travelers arrive with no memory of their past, each clutching a Crystal
You could replace it with something like Ravenous Chupacabra if you wanted to add a little more removal while lowering the mana curve

Creature Human Werewolf // Creature Werewolf Common Andrew Mar null/null NOT LEGAL Standard NOT LEGAL Future LEGAL Historic LEGAL Timeless LEGAL Gladiator LEGAL Pioneer LEGAL Explorer LEGAL Modern LEGAL Legacy LEGAL Pauper LEGAL Vintage NOT LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Standardbrawl LEGAL Brawl NOT LEGAL Alchemy LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool NOT LEGAL Premodern NOT LEGAL Predh Menace Daybound -------- Menace Nightbound (This creature can't be blocked except by two or more creatures.) Daybound (If a player casts no spells during their own tunr, it becomes night next turn.) -------- Fearsome Werewolf Menace (This creature can't be blocked except by two or more creatures.) Nightbound (If a player casts at least two spells during their own turn, if becomes day next turn.) Menace (This creature can't be blocked except by two or more creatures.) Daybound (If a player casts no spells during their own turn, it becomes night next turn.) Daybound (If a player casts no spells during their own turn, it becomes night next turn.) Menace (This creature can't be blocked except by two or more creatures.) Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.) Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Yshtola, Nights Blessed On the surface, Yshtola, Nights Blessed seems like a simple but efficient card