Silver, Time Traveling Hero

Partner with Blaze, interdimensional Heroine
Reach, Hexproof
Psychic Assault-{2},{t}, Sacrifice another nonland permanent: Silver deals damage to a target equal to its mana value, then exile cards from the top of your library until you reveal a nonland permanent with equal or lesser mana value and cast it without paying its cost. Put the remaining cards back on the bottom of your library in a random order.