Teenage Mutant Ninja Turtles Splinter's Technique Sorcery Sneak (You may cast this spell for if you also return an unblocked attacker you control to hand during the declare blockers step.)
Search your library for a card, put that card into your hand, then shuffle.
"Behold the secret technique only taught to true masters of the Foot Clan." Illustrated by Daniel Elson All Magic: The Gathering (MTG) card images and symbols Wizards of the Coast